[1] Univ Munich, Internal Med 5, Comprehens Pneumol Ctr, Munich, Germany
[2] Heidelberg Univ, Ctr Interstitial & Rare Lung Dis, Thoraxklin, Heidelberg, Germany
[3] Med Sch, Pneumol, Hannover, Germany
[4] Univ Hosp, Med Clin 1, Leipzig, Germany
[5] Tech Univ, Fac Med, Inst Clin Pharmacol, Dresden, Germany
[6] German Rheuma Res Ctr DRFZ, Epidemiol, Berlin, Germany
[7] Univ Schleswig Hostein, Acad Teaching Hosp, LungenClin, Grosshansdorf, Germany
[8] Evangel Lungenkrankenhaus Buch, Klin Pneumol, Berlin, Germany
[9] Univ Gottingen, Teaching Hosp, Lungenfachklin, Immenhausen, Germany
[10] Univ Klinikum, Bonn, Germany
[11] Boehringer Ingelheim GmbH & Co KG, Ingelheim, Germany
[12] Staedt Klinikum LZM Bogenhausen Harlaching, Lungenzentrum, Munich, Germany
[13] Klinikum Univ, Lungenforsch Ambulanz, Comprehens Pneumol Ctr, Munich, Germany
[14] Univ Klinikum, Pneumol, Klin Innere Med 5, Homburg, Germany
[15] Krankenhaus Bethanien, Solingen, Germany
[16] Ctr Internal Med Studies, Bamberg, Germany
[17] Klinkum Augsburg, Klin Pneumol, Augsburg, Germany
[18] DZL, Pneumol, LungenClin Grosshansdorf, Grosshansdorf, Germany
[19] Ernst Mortiz Arndt Univ, Greifswald, Germany
[20] Missionsarztliche Klin, Wurzburg, Germany
[21] Univ Munich, Comprehens Pneumol Ctr, Munich, Germany
[22] Fachkrankenhaus, Zentrum Pneumol, Coswig, Germany