1. Institute of Psychology, University of Bern, Bern, Switzerland
2. Department of Economics, University of Konstanz, Konstanz, Germany
3. Thurgau Institute of Economics, Kreuzlingen, Switzerland
4. University Hospital of Psychiatry Zurich, University of Zurich, Zurich, Switzerland
5. Universitätsinstitut für Klinische Chemie, University of Bern, Bern, Switzerland