[1] Inselspital Bern, Allgemeine Innere Med, Bern, Switzerland
[2] Univ Bern, Dept Clin Res, Bern, Switzerland
[3] Univ Spital Genf, Angiol, Ghent, Belgium
[4] Berner Inst Hausarztmed BIHAM, Bern, Switzerland
[5] Univ Spital Lausanne, Innere Med, Lausanne, Switzerland