[1] Univ Zurich, Dept Psychiat Res, CH-8029 Zurich, Switzerland
[2] Univ Basel, Dept Physiol, Basel, Switzerland
[3] Univ Basel, Dept Psychiat, Basel, Switzerland
[4] Univ Basel, Dept Clin Chem, Basel, Switzerland
[5] Natl Cardiovasc Ctr, BF Res Inst, Osaka, Japan
[6] State Hosp St Gallen, Inst Clin Chem & Hematol, St Gallen, Switzerland