[1] Heidelberg Univ, Thoraxklin, Ctr Interstitial & Rare Lung Dis Pneumol & Resp C, Heidelberg, Germany
[2] German Ctr Lung Res, Giessen, Germany
[3] Cleveland Clin, Resp Inst, Cleveland, OH 44106 USA
[4] Nippon Med Sch, Grad Sch Med, Dept Allergy & Rheumatol, Tokyo, Japan
[5] Nippon Med Sch, Grad Sch Med, Dept Pulm Med & Oncol, Tokyo, Japan
[6] Imperial Coll London, Natl Heart & Lung Inst, London, England
[7] Royal Brompton Hosp, Natl Inst Hlth Res, Clin Res Facil, London, England
[8] Univ Texas Mcgovern Med Sch, Div Rheumatol & Clin Immunogenet, Houston, TX USA
[9] Univ Washington, Seattle, WA 98195 USA
[10] Boehringer Ingelheim France SAS, Reims, France
[11] Boehringer Ingelheim Pharmaceut Inc, 90 E Ridge POB 368, Ridgefield, CT 06877 USA
[12] Boehringer Ingelheim Int GmbH, Ingelheim, Germany
[13] Univ Hosp Zurich, Dept Rheumatol, Zurich, Switzerland