[1] Univ Colorado, Sch Med, Aurora, CO USA
[2] Univ Alabama Birmingham, Birmingham, AL USA
[3] Aarhus Univ Hosp, Aarhus, Denmark
[4] Vanderbilt Univ, Ctr Lung Res, Nashville, TN 37232 USA
[5] Hop Bichat Claude Bernard, AP HP, Paris, France
[6] Natl Jewish Hlth, Denver, CO USA
[7] Univ Penn, Sch Med, Philadelphia, PA 19104 USA
[8] Univ Calif San Francisco, San Francisco, CA 94143 USA
[9] Royal Prince Alfred Hosp, Sydney, SA, Australia
[10] INSERM, Unit 1152, Serv Pneumol, Paris, France
[11] Imperial Coll London, London, England
[12] Univ Colorado, Denver, CO 80202 USA
[13] Univ Pittsburgh, Sch Med, Pittsburgh, PA USA
[14] Dublin City Univ, Dublin, Ireland
[15] Landspital Univ Hosp, Reykjavik, Iceland
[16] Univ Edinburgh, Edinburgh, Midlothian, Scotland
[17] Natl Hosp Org Kinki Chuo Chest Med Ctr, Osaka, Japan
[18] Univ Nottingham, Nottingham, England
[19] Univ Pittsburgh, Simmons Ctr Interstitial Lung Dis, Pittsburgh, PA USA
[20] Trinity Coll Dublin, Dublin, Ireland
[21] Asan Med Ctr, Seoul, South Korea
[22] Univ Western Australia, Nedlands, WA, Australia
[23] Columbia Univ, Med Ctr, New York, NY USA
[24] Vanderbilt Univ, Med Ctr, Nashville, TN USA
[25] Ege Univ Hosp, Izmir, Turkey
[26] Univ Hosp Bellvitge, Lhospitalet De Llobregat, Spain
[27] Inova Fairfax, Falls Church, VA USA
[28] Univ Chicago, Pulm & Crit Care Med, Chicago, IL 60637 USA
[29] Natl Hosp Org Tokyo Natl Hosp, Tokyo, Japan
[30] New Papworth Hosp, Cambridge, England
[31] Univ Western Australia, Crawley, WA, Australia
[32] Natl Inst Resp Dis, Mexico City, DF, Mexico
[33] Thomayer Hosp, Prague, Czech Republic
[34] Univ Leicester, Leicester, Leics, England
[35] UCSF, San Francisco, CA USA
[36] Univ Colorado, Aurora, CO USA