[1] Univ Heidelberg Hosp, Thoraxclin, Thoraxclin Heidelberg, Ctr Pulm Hypertens, Heidelberg, Germany
[2] Univ Bologna, Inst Cardiol, Bologna, Italy
[3] Univ Paris 11, Le Kremlin Bicetre, France
[4] INSERM, F-94275 Le Kremlin Bicetre, France
[5] Hop Bicetre, AP HP, Serv Pneumol, Le Kremlin Bicetre, France
[6] St Vincents Hosp, Heart Lung Transplant Unit, Sydney, NSW 2010, Australia
[7] McGill Univ, Jewish Gen Hosp, Lady Davis Inst Med Res, Ctr Pulm Vasc Dis, Montreal, PQ H3T 1E2, Canada
[8] Univ Calif San Diego, Sch Med, La Jolla, CA 92093 USA
[9] Univ Zurich Hosp, Dept Internal Med, Zurich, Switzerland
[10] Bayer HealthCare Pharmaceut, Global Clin Dev, Wuppertal, Germany
[11] Univ Giessen, Dept Internal Med, Giessen, Germany
[12] Marburg Lung Ctr UGMLC, Giessen, Germany