[1] Univ Cincinnati, Med Ctr, Dept Med, Cincinnati, OH 45267 USA
[2] Univ Sorbonne Paris Nord, Hop Avicenne, AP HP, INSERM UMR 1272, Bobigny, France
[3] Grp Hosp Paris St Joseph, Paris, France
[4] Univ Med Ctr Gottingen, Dept Nephrol & Rheumatol, Gottingen, Germany
[5] Manchester Univ NHS Fdn Trust, Wythenshawe Hosp, North West Lung Ctr, Manchester, Lancs, England
[6] Univ Manchester, Div Infect Immun & Resp Med, Manchester, Lancs, England
[7] Univ Hosp Leuven, Dept Resp Med, Unit Interstitial Lung Dis, Leuven, Belgium
[8] Royal Brompton Hosp, London, England
[9] Siena Univ, Dept Med Surg & Neurol Sci, Specializat Sch Resp Dis, Siena, Italy
[10] Univ Sorbonne Paris Nord, Hop Avicenne, AP HP,INSERM UMR 1272, Serv Pneumol,Ctr Reference Malad Pulmonaires Rare, Bobigny, France
[11] Albany Med Coll, Dept Med, Albany, NY 12208 USA
[12] Univ Paris, Hop Europeen Georges Pompidou, AP HP, Ctr Competences Malad Rares Pulmonaires, Paris, France
[13] St Antonius Hosp, Dept Pulmonol, ILD Ctr Excellence, Nieuwegein, Netherlands
[14] Univ Med Ctr Utrecht, Div Heart & Lungs, Utrecht, Netherlands
[15] Maastricht Univ, Fac Hlth & Life Sci, Dept Pharmacol & Toxicol, Maastricht, Netherlands
[16] ILD Care Fdn Res Team, Ede, Netherlands
[17] Cleveland Clin, Cleveland, OH 44106 USA
[18] Univ Essen Gesamthsch, Univ Hosp, Ruhrlandklin, Ctr Interstitial & Rare Lung Dis,Pneumol Dept, Essen, Germany
[19] Univ Crete, Med Sch, Lab Mol & Cellular Pneumonol, Dept Resp Med, Iraklion, Greece
[20] Amici Contro Sarcoidosi Italia ONLUS, Bologna, Italy
[21] Deutsch Sarkoidose Vereinigung eV DSV, Meerbusch, Germany
[22] Fdn Sarcoidosis Res, Chicago, IL USA
[23] Univ Freiburg, Med Ctr, Inst Evidence Med, Freiburg, Germany
[24] Univ Freiburg, Fac Med, Freiburg, Germany
[25] Univ Bern, Inst Social & Prevent Med, Bern, Switzerland
[26] Cochrane Iberoamer, Barcelona, Spain
[27] Henry Ford Hosp, Detroit, MI 48202 USA