[1] Ohio State Univ Wexner Med Ctr, Dept Med, Columbus, OH 43210 USA
[2] McGill Univ, Jewish Gen Hosp, Ctr Pulm Vasc Dis, Div Cardiol, Montreal, PQ, Canada
[3] Vanderbilt Univ Sch Med, Dept Med, Div Allergy Pulm & Crit Care Med, Nashville, TN USA
[4] Vrije Univ Amsterdam Med Ctr, Pulm Dis, Amsterdam, Netherlands
[5] Cologne Univ Heart Ctr, Dept Cardiol, Cologne, Germany
[6] Univ Minnesota, Dept Med, Cardiovasc Div, Minneapolis, MN USA
[7] Johns Hopkins Univ, Pulm & Crit Care Med, Baltimore, MD USA
[8] Tufts Med Ctr, Pulm Crit Care & Sleep Med Div, Boston, MA USA
[9] Fdn IRCCS Policlin San Matteo, Div Cardiol, Pavia, Italy
[10] Sapienza Univ, Dept Cardiol, Rome, Italy
[11] Med Univ Vienna, Allgemeines Krankenhaus, Dept Internal Medicine 2, Div Cardiol, Vienna, Austria
[12] Global Med Affairs, Bayer AG, Berlin, Germany
[13] Heidelberg Univ Hosp, Ctr Pulm Hypertens, Thoraxklin Heidelberg gGmbH, Heidelberg, Germany