[1] Sahlgrenska Univ Hosp, Dept Med, Gothenburg, Sweden
[2] Univ Hosp, Dept Med, Aachen, Germany
[3] Nottingham Clin Res Grp, Nottingham, England
[4] Univ Hull, Acad Dept Cardiol, Kingston Upon Hull, Yorks, England
[5] Osped Cattinara, Trieste, Italy
[6] Natl Heart & Lung Inst, London, England
[7] Bispebjerg Univ Hosp, Dept Cardiol, Copenhagen, Denmark
[8] Sticares Cardiovasc Res Fdn, Dept Med, Rhoon, Netherlands