[1] Ludwig Maximilians Univ Munchen, Univ Hosp, Dept Med 5, Munich, Germany
[2] Asklepios Fachkliniken Gauting, Comprehens Pneumol Ctr, German Ctr Lung Res, Munich, Germany
[3] Univ Leuven, Dept Pulm Med, Unit Interstitial Lung Dis, Leuven, Belgium
[4] Louisville Pulm Care, Louisville, KY USA
[5] F Hoffmann La Roche Ltd, Basel, Switzerland
[6] Inova Fairfax Hosp, Inova Heart & Vasc Inst, Falls Church, VA USA