[1] Monash Univ, Alfred Hosp, Dept Epidemiol & Prevent Med, Monash Ctr Cardiovascu Res & Educ Therapeut, Melbourne, Vic 3004, Australia
[2] Univ Oslo, Ulleval Hosp, Dept Cardiol B, N-0407 Oslo, Norway
[3] Univ Oslo, Fac Med, Inst Clin Med, Oslo, Norway
[4] Mayo Clin, Div Cardiovasc Dis, Cardiorenal Res Lab, Rochester, MN USA