[1] Bispebjerg Hosp, Dept Cardiol, Copenhagen, Denmark
[2] Copenhagen Univ Hosp, Dept Clin Biochem, Rigshosp, Copenhagen, Denmark
[3] Copenhagen Univ Hosp, Heart Ctr, Dept Cardiol, Rigshosp, Copenhagen, Denmark
[4] Akershus Univ Hosp, Oslo, Norway
[5] Oslo Univ Hosp Ulleval, Dept Cardiol, Oslo, Norway
[6] Univ Michigan Hlth Syst, Div Cardiovasc Med, Ann Arbor, MI USA
[7] Weill Cornell Med, Greenberg Div Cardiol, New York, NY USA