[1] Univ Hosp Bern, Div Endocrinol Diabet & Clin Nutr, CH-3010 Bern, Switzerland
[2] Univ Hosp Bern, Dept Clin Res MR Spect & Methodol, CH-3010 Bern, Switzerland
[3] Univ Hosp Bern, Ctr Lab Med, CH-3010 Bern, Switzerland
[4] Univ Lausanne, Inst Physiol, Lausanne, Switzerland
[5] Univ Hosp Bern, Div Cardiovasc Prevent Rehabil & Sports Cardiol, CH-3010 Bern, Switzerland