[1] Univ Med Ctr Groningen, NL-9713 AV Groningen, Netherlands
[2] Univ Glasgow, Glasgow, Lanark, Scotland
[3] Suny Downstate Med Ctr, New York, NY USA
[4] Saarland Univ Hosp, Dept Internal Med 3, Homburg, Germany
[5] Univ Paris 06, Paris, France
[6] Sahlgrens Univ Hosp, Cardiovasc Inst, Gothenburg, Sweden
[7] Maria Cecilia Hosp GVM Care & Res, Ettore Sansavini Hlth Sci Fdn, Cotignola, Italy