[1] Oslo Univ Hosp, Dept Resp Med, Oslo, Norway
[2] Univ Oslo, Fac Med, Oslo, Norway
[3] Harvard Med Sch, Brigham & Womens Hosp, Ctr Adv Heart Dis, Boston, MA 02115 USA
[4] Hosp Univ Penn, Div Pulm & Crit Care Med, 3400 Spruce St, Philadelphia, PA 19104 USA
[5] Stanford Univ, Med Ctr, Div Cardiovasc Med, Stanford, CA 94305 USA
[6] Washington Univ, Sch Med, Div Allergy & Pulm Med, St Louis, MO USA
[7] Bologna Univ Hosp, Cardiovasc Dept, Bologna, Italy
[8] Univ Toronto, Univ Hlth Network, Dept Med, Toronto, ON, Canada
[9] Hosp Clin Barcelona, Adv Heart Failure Unit, Barcelona, Spain
[10] West Virginia Univ Hosp, Morgantown, WV USA
[11] Ohio State Univ, Div Cardiovasc Dis, Columbus, OH 43210 USA
[12] Univ Med Ctr Schleswig Holstein, Dept Cardiac & Thorac Vasc Surg, Campus Lubeck, Lubeck, Germany
[13] Univ Calif San Diego, Div Infect Dis & Global Publ Hlth, 4510 Execut Dr,MC 7745, San Diego, CA 92121 USA