91. Tylenol Toxicity and Acute Liver Failure

This week we’re talking about a case as a lens for discussing Tylenol toxicity and Acute Liver Failure. These relatively common critical care presentations are essential knowledge for anyone practicing in the ICU. Listen in for some key discussion both about toxicology and the diagnosis and management of acute livery injury and failure.

 

Kalaila Pais received her MD from Howard University College of Medicine and is currently a second year internal medicine resident at BIDMC. She is interested in pulmonary and critical care, as well as medical education. She also had the idea for this episode and was essential in its writing and production.

Hima Veeramachaneni received her MD from University of Missouri-Kansas City School of Medicine, and her residency at Emory where she was also a Chief Resident at Grady Memorial Hospital. She is a gastroenterologist and completed her GI and transplant hepatology training at Emory. She is also now doing a critical care medicine fellowship year.

 

Presentation: Patient found down, surrounded by liquor bottles, with coffee-ground emesis, hemodynamic instability, scleral icterus, and metabolic derangements.

Key Lab Findings:

  • Severe transaminitis (AST >10,000, ALT ~3,000).
  • Elevated bilirubin (5.8), lactate (16), and INR (>2).
  • Metabolic acidosis with a pH of 7.04.
  • Tylenol level: 41 (slightly elevated but inconclusive without ingestion timing).

 

Infographic:

Acute Liver Injury vs. Acute Liver Failure

  • Acute Liver Injury (ALI): Elevated liver enzymes without encephalopathy or significant synthetic dysfunction.
  • Acute Liver Failure (ALF): Defined by:
    • Presence of encephalopathy.
    • Coagulopathy (elevated INR).
    • Rapid onset (<26 weeks) in patients without pre-existing liver disease.
  • ALF often leads to complications such as cerebral edema, which necessitates aggressive management.

Tylenol Toxicity and Interpretation

  • Pathophysiology:
    • Tylenol overdose overwhelms liver glutathione, leading to accumulation of NAPQI, which causes hepatocyte necrosis.
  • Interpretation of Tylenol Levels:
    • Timing of ingestion is critical to interpreting levels.
    • The Rumack-Matthew Nomogram is used for acute ingestions but requires a known ingestion time.
  • Management:
    • N-acetylcysteine (NAC): Standard of care; acts as a glutathione precursor and mitigates liver damage.
    • Early use is recommended in suspected cases of Tylenol toxicity, even if ingestion timing is unclear.

Critical Management Principles

  • Stabilization: Focus on airway, hemodynamics, and perfusion.
    • Monitor for signs of cerebral edema (e.g., pupillary changes, seizures).
    • In select patients, use hypertonic saline to maintain sodium levels (145–150 mmol/L) to mitigate cerebral edema risks.
  • CRRT and Plasma Exchange:
    • Continuous renal replacement therapy (CRRT) for hyperammonemia and acidosis.
    • Plasma exchange (PLEX) may stabilize cytokine storms and improve survival.
  • Organ-Specific Considerations:
    • Renal failure: Common due to hepatorenal syndrome; requires CRRT.
    • Coagulopathy: Managed with blood products as needed but indicates worsening liver synthetic dysfunction.

Prognosis and Transplant Considerations

  • King’s College Criteria: Guides transplant listing for ALF patients.
    • Factors: Encephalopathy severity, INR, lactate, bilirubin trends.
  • Ethical considerations for liver transplant in patients with substance use or overdose:
    • Emphasis on assessing social support and addressing psychiatric needs.
    • Efforts are made to ensure equitable access to transplant when warranted.

Takeaways for Clinical Practice

  1. Broad Differential Diagnosis: Keep a wide perspective for acute liver presentations, considering toxins, infections, and systemic conditions.
  2. Early Use of NAC: Err on the side of initiating NAC when Tylenol toxicity is suspected.
  3. CNS Focus in ALF: Monitor and manage cerebral edema aggressively.
  4. CRRT & PLEX: Advanced liver support techniques are critical in select cases.
  5. Interdisciplinary Collaboration: Psychiatrists, neurocritical care, and hepatologists play pivotal roles in management.

 

90. Rapid Fire Journal Club: ANDROMEDA-SHOCK

We are excited to be back with a Rapid Fire Journal Club. Today’s episode is hosted by PulmPEEPs Associate Editor, Luke Hedrick, and will delve into the ANDROMEDA-SHOCK trial published in JAMA in 2019.

Jose Meade Aguilar is a second year Internal Medicine resident at Boston University Medical Campus (BUMC).

Today the discussion highlights the ANDROMEDA-SHOCK trial (JAMA, 2019) which evaluated whether resuscitation guided by capillary refill time (CRT) is superior to lactate-guided resuscitation in reducing mortality in patients with septic shock.

Hernández G, Ospina-Tascón GA, Damiani LP, Estenssoro E, Dubin A, Hurtado J, Friedman G, Castro R, Alegría L, Teboul JL, Cecconi M, Ferri G, Jibaja M, Pairumani R, Fernández P, Barahona D, Granda-Luna V, Cavalcanti AB, Bakker J; The ANDROMEDA SHOCK Investigators and the Latin America Intensive Care Network (LIVEN); Hernández G, Ospina-Tascón G, Petri Damiani L, Estenssoro E, Dubin A, Hurtado J, Friedman G, Castro R, Alegría L, Teboul JL, Cecconi M, Cecconi M, Ferri G, Jibaja M, Pairumani R, Fernández P, Barahona D, Cavalcanti AB, Bakker J, Hernández G, Alegría L, Ferri G, Rodriguez N, Holger P, Soto N, Pozo M, Bakker J, Cook D, Vincent JL, Rhodes A, Kavanagh BP, Dellinger P, Rietdijk W, Carpio D, Pavéz N, Henriquez E, Bravo S, Valenzuela ED, Vera M, Dreyse J, Oviedo V, Cid MA, Larroulet M, Petruska E, Sarabia C, Gallardo D, Sanchez JE, González H, Arancibia JM, Muñoz A, Ramirez G, Aravena F, Aquevedo A, Zambrano F, Bozinovic M, Valle F, Ramirez M, Rossel V, Muñoz P, Ceballos C, Esveile C, Carmona C, Candia E, Mendoza D, Sanchez A, Ponce D, Ponce D, Lastra J, Nahuelpán B, Fasce F, Luengo C, Medel N, Cortés C, Campassi L, Rubatto P, Horna N, Furche M, Pendino JC, Bettini L, Lovesio C, González MC, Rodruguez J, Canales H, Caminos F, Galletti C, Minoldo E, Aramburu MJ, Olmos D, Nin N, Tenzi J, Quiroga C, Lacuesta P, Gaudín A, Pais R, Silvestre A, Olivera G, Rieppi G, Berrutti D, Ochoa M, Cobos P, Vintimilla F, Ramirez V, Tobar M, García F, Picoita F, Remache N, Granda V, Paredes F, Barzallo E, Garcés P, Guerrero F, Salazar S, Torres G, Tana C, Calahorrano J, Solis F, Torres P, Herrera L, Ornes A, Peréz V, Delgado G, López A, Espinosa E, Moreira J, Salcedo B, Villacres I, Suing J, Lopez M, Gomez L, Toctaquiza G, Cadena Zapata M, Orazabal MA, Pardo Espejo R, Jimenez J, Calderón A, Paredes G, Barberán JL, Moya T, Atehortua H, Sabogal R, Ortiz G, Lara A, Sanchez F, Hernán Portilla A, Dávila H, Mora JA, Calderón LE, Alvarez I, Escobar E, Bejarano A, Bustamante LA, Aldana JL. Effect of a Resuscitation Strategy Targeting Peripheral Perfusion Status vs Serum Lactate Levels on 28-Day Mortality Among Patients With Septic Shock: The ANDROMEDA-SHOCK Randomized Clinical Trial. JAMA. 2019 Feb 19;321(7):654-664. doi: 10.1001/jama.2019.0071. PMID: 30772908; PMCID: PMC6439620.

89. Idiopathic Pulmonary Fibrosis Treatment: RFJC – INPULSIS

Our episode today is diving into a broader initiative to discuss the management of interstitial lung disease. In this episode we will be talking about the treatment of Idiopathic Pulmonary Fibrosis through the lens of a journal club discussion of the NEJM 2014 INPULSIS trial. Today’s episode is hosted by Pulm PEEPs Associate Editor Luke Hedrick.

Robert Wharton is a recurring guest on Pulm PEEPs as a part of our Rapid Fire Journal Club Series. He completed his internal medicine residency at Mt. Sinai in New York City, and is currently a first year pulmonary and critical care fellow at Johns Hopkins.

Dr. Nicole Ng is an Assistant Profess of Medicine at Mount Sinai Hospital, and is the Associate Director of the Interstitial Lung Disease Program for the Mount Sinai National Jewish Health Respiratory Institute.

Today the discussion of IPF treatment centers around the 2014 NEJM publication of the INPULSIS trials investigating the efficacy of Nintedanib for the treatment of IPF.

Richeldi L, du Bois RM, Raghu G, Azuma A, Brown KK, Costabel U, Cottin V, Flaherty KR, Hansell DM, Inoue Y, Kim DS, Kolb M, Nicholson AG, Noble PW, Selman M, Taniguchi H, Brun M, Le Maulf F, Girard M, Stowasser S, Schlenker-Herceg R, Disse B, Collard HR; INPULSIS Trial Investigators. Efficacy and safety of nintedanib in idiopathic pulmonary fibrosis. N Engl J Med. 2014 May 29;370(22):2071-82. doi: 10.1056/NEJMoa1402584. Epub 2014 May 18. Erratum in: N Engl J Med. 2015 Aug 20;373(8):782. doi: 10.1056/NEJMx150012. PMID: 24836310.

Infographic

Background and Challenges in ILD Treatment: Interstitial lung diseases (ILDs), particularly idiopathic pulmonary fibrosis (IPF), had historically poor treatment outcomes, with numerous therapies showing either no benefit or even harm. Prior to 2014, effective treatments were extremely limited, and lung transplantation was the primary management option.

INPULSIS I and II Trials: These 2014 trials examined nintedanib, an antifibrotic drug initially tested for cancer, in patients with moderate IPF. The studies were well-structured, involving strict criteria to ensure accurate diagnoses and excluding younger patients or those with more advanced disease.

Nintedanib’s Mechanism and Design of the Trials: Nintedanib acts by blocking multiple tyrosine kinases that mediate fibrotic growth factors. Patients were monitored over a year, with primary endpoints focusing on forced vital capacity (FVC) decline—a common surrogate measure for disease progression in ILD trials due to its correlation with survival.

Outcomes: Both trials showed that nintedanib significantly reduced the rate of FVC decline compared to placebo, suggesting that it slowed disease progression. Secondary endpoints included reduced acute exacerbations (significant only in one trial) and minor improvements in quality of life, though these weren’t statistically or clinically significant.

Adverse Effects: Nintedanib’s side effects included gastrointestinal issues (diarrhea, nausea, vomiting) and, less commonly, liver enzyme elevations and cardiovascular events. While post-marketing data suggested some improvements in tolerability, clinicians still monitor for these side effects closely.

Application in Clinical Practice: The trials support nintedanib as an option for slowing IPF progression, though no cure or disease reversal is achieved. Clinicians weigh the choice between nintedanib and pirfenidone (another antifibrotic) based on each drug’s side effect profile and individual patient needs.

Future Directions: The trials paved the way for further research into multi-therapy approaches for ILD, targeting multiple disease pathways, similar to strategies in asthma or COPD. Upcoming therapies and trials aim to provide more targeted and effective options for IPF and other ILDs.

88. Fellows’ Case Files: NYU

We are joined today by two amazing educators from NYU for our latest Fellows’ Case Files Episode. Listen today as we go through a great case with some fantastic teaching points highlighted throughout the episode.

Dr. Jeremy Grossman completed his Medicine-Pediatrics residency at Stony Brook Medicine where he was also a Chief Resident. He is currently a second-year PCCM fellow at NYU.

Dr. Shari Brosnahan is an Assistant Professor of Medicine and one of the Assistant Program Directors for the NYU Langone’s Division of Pulmonary, Critical Care, and Sleep Medicine. Her clinical and research interests are focused on pulmonary embolism and thrombosis in critically ill patients.

An 80-year-old male presents with shortness of breath. At home, his oxygen saturation was 82% on room air, improving only to 86% on 4L nasal cannula. Over the past month, he has experienced worsening symptoms, including a dry cough, fatigue, and difficulty speaking or ambulating due to shortness of breath at rest. He denies recent fever, sputum production, chest pain, or lower extremity swelling and presents to the ED for further evaluation.

1.In any patient with a history of malignancy and hypoxia, clinicians should keep pulmonary tumor emboli (PTE) on the differential as early intervention may alter outcomes.

2.PTE contributes to hypoxia via mechanisms of mechanical obstruction of pulmonary arteries leading to shunting, VQ Mismatch, and in some cases pulmonary hypertension due to increased PVR.

3.A wedged aspirate can be used to diagnose PTE ante-mortem

87. Live from CHEST 2024 – Black Angels with Maria Smilios

Here at Pulm PEEPs we have always loved the CHEST Annual Meetings. We have enjoyed learning at them, reuniting with and meeting colleagues, and having conference specific episodes the past two years. This year, we had the opportunity to podcast live at CHEST 2024 and it was a real thrill! We talked to Maria Smilios about her wonderful book The Black Angels: The Untold Story of the Nurses Who Helped Cure Tuberculosis. . The book covers a range of fascinating topics including how treatments for tuberculosis were developed, the successes and plights of Black nurses working in this endeavor, an exploration of health care in New York City, and a discussion of Racism and civil rights in American healthcare.

We were also thrilled that Virginia Allen, the last surviving Black Angel is at the conference and her and her colleagues (posthumously) are receiving an honorary FCCP.

Maria Smiios is a native New Yorker but completed her master of arts in religion and literature right here in Boston. She completed her masters at Boston University, where she was a Luce scholar, and taught in the religion and writing program. Through her work, she found a love for history, medicine and women’s narratives. While working at Springer Publishing as a science book editor, she learned about the story of the Black Angels and was determined to tell their story. She spent years deeply engaged in the lives and stories of those who were closest to these remarkable women.

86. CHEST 2024 Preview

We are excited to be back with our colleagues from CHEST to be previewing the CHEST 2024 Annual Meeting. CHEST his year is in Boston, MA from October 5th to October 9th. Listen in to hear about some great new features at CHEST this year, some old favorites, and to learn how to optimize your conference experience. See you all in two weeks!

Sandhya Khurana is a  Professor of medicine at University of Rochester school of medicine and Director of the Mary Parkes Asthma Center. Her clinical and research interest is in asthma. She is the Vice-Program Chair for CHEST 2024 and will be the program Chair for CHEST 2025 next year in Chicago.

Gabe Bosslet is the Program Chair for CHEST this year. In addition he is a Professor of Clinical Medicine at Indiana University School of Medicine. He is also an Assistant Dean at IU, and the Director of Mentoring and Faculty Development for the Division Pulmonary, Critical Care, Allergy and Occupational Medicine.

Huzaifah Salat is a clinician educator who is currently working as a consultant pulmonologist and intensivist at Advocate Aurora Health in Wisconsin. He completed his Pulmonary and Critical Care Fellowship at the University of Oklahoma Health Sciences Center

85. Journal Club with BMJ Thorax – Airway Disease

We are extremely excited today to announce a new collaboration with BMJ Thorax. Our mission at Pulm PEEPs is to disseminate and promote pulmonary and critical care education, and we highly value the importance of peer reviewed journals in this endeavor. Each month in BMJ Thorax, a journal club is published looking at high yield and impactful publications in pulmonary medicine. We will be putting out quarterly episodes in association with Thorax to discuss a journal club publication and synthesize four valuable papers. We hope you enjoy!

Chris Turnbull is an Associate Editor for Education at Thorax. He is an Honorary Researcher and Respiratory Medicine Consultant at Oxford University Hospitals. In addition to his role as Associate Editor for Education at BMJ Thorax, he is also a prominent researcher in sleep-related breathing disorders.

 Imran Howell is an Asthma Fellow at the Nuffield Department of Medicine, University of Oxford

To submit a journal club article of your own to Thorax, you can contact Chris directly – christopher.turnbull@ouh.nhs.uk


To engage with Thorax, please use the social media channels (Twitter – @ThoraxBMJ; Facebook – Thorax.BMJ) and subscribe on your preferred platform, to get the latest episodes directly on your device each month.

84. RFJC 14 – ARDS Series – Driving Pressure

In this podcast episode, we continue our summer series reviewing landmark ARDS studies. Today, Dave and Luke discuss the Driving Pressure trial (published in NEJM in 2015) which evaluated the impact of driving pressure on survival in patients with ARDS.

Article and Reference

We are talking about the Driving Pressure trial today which evaluated the impact of driving pressure, as an independent variable, on survival in patients with ARDS.

Amato MB, Meade MO, Slutsky AS, Brochard L, Costa EL, Schoenfeld DA, Stewart TE, Briel M, Talmor D, Mercat A, Richard JC, Carvalho CR, Brower RG. Driving pressure and survival in the acute respiratory distress syndrome. N Engl J Med. 2015 Feb 19;372(8):747-55. doi: 10.1056/NEJMsa1410639. PMID: 25693014.

Infographic

83. RFJC 13 – ARDS Series – DEXA-ARDS

In the penultimate episode in our ARDS Rapid Fire Journal Club Summer Series we are talking about the DEXA-ARDS trial (published in Lancet Respiratory Medicine in 2020). This trial evaluated the impact of dexamethasone in the treatment of ARDS.

 

Article and Reference

Today we’re discussing the DEXA-ARDS trial published in Lancet Respiratory Medicine in 2020. This trial evaluated the impact of dexamethasone on mortality and duration of mechanical ventilation for patients with ARDS.

Villar J, Ferrando C, Martínez D, Ambrós A, Muñoz T, Soler JA, Aguilar G, Alba F, González-Higueras E, Conesa LA, Martín-Rodríguez C, Díaz-Domínguez FJ, Serna-Grande P, Rivas R, Ferreres J, Belda J, Capilla L, Tallet A, Añón JM, Fernández RL, González-Martín JM; dexamethasone in ARDS network. Dexamethasone treatment for the acute respiratory distress syndrome: a multicentre, randomised controlled trial. Lancet Respir Med. 2020 Mar;8(3):267-276. doi: 10.1016/S2213-2600(19)30417-5. Epub 2020 Feb 7. PMID: 32043986.

 

Infographic

 

Article Notes

  • DEXA-ARDS; Lancet Respiratory Medicine, 2020
    • DOI:10.1016/S2213-2600(19)30417-5
    • Link: https://doi.org/10.1016/s2213-2600(19)30417-5
    • Background: ARDS is an intense inflammatory process without proven, specific pharmacotherapies. Previous work and a recent meta-analysis demonstrated improvements in inflammation, gas exchange, and ventilator and ICU liberation but did not adequately address mortality.
    • Study Design (design, primary outcome, participants, etc)
      • Design: investigator-initiated, multicenter, unblinded, randomized controlled trial in 17 academic ICUs in Spain, conducted from 3/2013 to 12/2018
      • Primary Outcome
        • VFD at 28d
        • Secondary:
          • 60d mortality
          • Actual duration of ventilation in ICU survivors
          • ICU acquired infections
      • Participants
        • Inclusion ARDS with P/F < 200 for < 24hr on LTVV
        • Exclusion:
          • Already receiving steroids or immunosuppression
          • CHF
          • Severe COPD
          • DNR
        • Summary: Middle aged, mostly male patients with < 24hr of moderate to severe ARDS receiving LPV without chronic heart or lung disease
          • Like many ARDS trials, just over 3/4 of patients’ ARDS was caused by PNA or sepsis. Mean P/F was ~140
    • Intervention/Limitations
      • N = 277, stratified by center and then randomized
      • Intervention: dexamethasone 20mg qd for 5d followed by 10mg qd for 5d
        • Stopped early for extubation before day 10
        • First dose given no more than 30 hours after P/F < 200
      • Control: no placebo, just SOC
      • All patients received LTVV
    • Outcomes/Safety
      • Power: with N = 314 (actual N = 277), 80% power to detect 2 additional VFD and 15% mortality reduction
        • As an aside, this seems to be a theme in ICU trials: massively ambitious proposed benefits during power calculations and then under-enrolling for that power calculation ultimately resulting with a point estimate that favors the intervention but is not statistically significant.
      • Efficacy:
        • 60d mortality: 21% vs 36%, P = 0.0047
          • NNT of just < 7!
        • VFD at 28d: 12.3 vs 7.5, P < 0.0001
        • Actual duration of ventilation in ICU survivors: 14.2d vs 19.5d (P = 0.0009)
      • Safety:
        • Hyperglycemia: 76% vs 70%, P = 0.33
          • Always interesting in steroid trials when no change in glucose control is seen. This isn’t the most EBM thing I’ll ever say, but frankly I disregard this and assume steroids will cause hyperglycemia regardless of the trial results.
        • ICU acquired infections: 24% vs 25%, P = 0.75
    • Takeaway
      • In a narrowly selected population of patients without chronic heart or severe lung disease and with early, moderate ARDS (mostly from sepsis or pneumonia), dexamethasone reduced mortality and duration of mechanical ventilation.
        • If time, insert soap-box about etiology of ARDS being very important (EG, flu, fungal, parasitic, mycobacterial infections)

 

82. Fellows’ Case Files: UMass Chan

We have another great case in our Fellows’ Case Files coming today from UMass Chan. Listen in for a great discussion about a fascinating case with interesting physical exam and radiographic findings.

Dr. Jen Kodela completed her residency training at UMass Memorial Medical Center and is currently a third year PCCM fellow at UMass Chan.

Dr. Ariel McKenna completed her residency training at Maine Medical Center and is also currently a third year PCCM fellow at UMass Chan.

Dr. Will Wong is an Assistant Professor of Medicine and is the Program Director of the PCCM fellowship at UMass Chan

A 75 y/o F presenting with acute on chronic SOB, cough, L sided chest pain and rash. She has had ~7 months of progressive dyspnea, now a/w 2 months of productive cough, and several weeks of L sided chest pain and rash. She has been seen multiple times in the past two months for these sxs. During that time she received multiple antibiotic courses (urgent care, outpatient providers), including augmentin, azithromycin and levaquin, and asthma directed therapy (no steroids). Imaging throughout that time (CXRs, CTPE) show progression from a LLL infiltrate to bibasilar infiltrates. Despite these interventions, sxs continue to worsen. One month prior she was admitted to an OSH w/ continued worsening, vitals stable, exam nonfocal, mild leukocytosis but infectious w/u bland. Received broad spectrum abx. Bronch w/ BAL offers negative cultures, cytology, cell count w/ 66% neutrophils, 14% eosinophils. Discharged w/ dx of PNA on a 10 day course of levaquin and new exertional oxygen requirement of 2L. She then presents to Umass ~1 month later w/ continued progression of sxs

1. Formulate a differential diagnosis for non-resolving pneumonia

2. Evaluate the utility of transbronchial biopsy in the workup of undifferentiated ILD

3. Describe the clinical manifestations of antisynthetase syndrome and identify the differences in presentation associated with PL-12 positivity

1. Kuru T, Lynch JP 3rd. Nonresolving or slowly resolving pneumonia. Clin Chest Med. 1999 Sep;20(3):623-51. doi: 10.1016/s0272-5231(05)70241-0. PMID: 10516909.

2. Troy LK, Grainge C, Corte TJ, Williamson JP, Vallely MP, Cooper WA, Mahar A, Myers JL, Lai S, Mulyadi E, Torzillo PJ, Phillips MJ, Jo HE, Webster SE, Lin QT, Rhodes JE, Salamonsen M, Wrobel JP, Harris B, Don G, Wu PJC, Ng BJ, Oldmeadow C, Raghu G, Lau EMT; Cryobiopsy versus Open Lung biopsy in the Diagnosis of Interstitial lung disease alliance (COLDICE) Investigators. Diagnostic accuracy of transbronchial lung cryobiopsy for interstitial lung disease diagnosis (COLDICE): a prospective, comparative study. Lancet Respir Med. 2020 Feb;8(2):171-181. doi: 10.1016/S2213-2600(19)30342-X. Epub 2019 Sep 29. PMID: 31578168.

3. Hallowell RW, Danoff SK. Diagnosis and Management of Myositis-Associated Lung Disease. Chest. 2023 Jun;163(6):1476-1491. doi: 10.1016/j.chest.2023.01.031. Epub 2023 Feb 9. PMID: 36764512.

4. Hallowell RW, Paik JJ. Myositis-associated interstitial lung disease: a comprehensive approach to diagnosis and management. Clin Exp Rheumatol. 2022 Feb;40(2):373-383. doi: 10.55563/clinexprheumatol/brvl1v. Epub 2021 Mar 25. PMID: 33769263; PMCID: PMC8855729.

5. Marie I, Josse S, Decaux O, Dominique S, Diot E, Landron C, Roblot P, Jouneau S, Hatron PY, Tiev KP, Vittecoq O, Noel D, Mouthon L, Menard JF, Jouen F. Comparison of long-term outcome between anti-Jo1- and anti-PL7/PL12 positive patients with antisynthetase syndrome. Autoimmun Rev. 2012 Aug;11(10):739-45. doi: 10.1016/j.autrev.2012.01.006. Epub 2012 Feb 3. PMID: 22326685.