[1] Tufts Med Ctr, Div Pulm Crit Care & Sleep Med, Boston, MA 02111 USA
[2] Janssen Sci Affairs LLC, Titusville, NJ USA
[3] Cytel, Real World Evidence, Waltham, MA USA
[4] Actelion Pharmaceut, Titusville, NJ USA
[5] Univ Calif San Francisco, Div Cardiol, San Francisco, CA USA