1. Institute for Work and Organizational Psychology, University of Neuchâtel, Neuchâtel, Switzerland
2. Department of Psychology, University of Berne, Berne, Switzerland
3. Department of Surgery, Triemli Hospital, Zurich, Switzerland
4. Department of Visceral Surgery, University Hospital Lausanne (CHUV), Lausanne, Switzerland
5. Department of Visceral Surgery and Medicine, Berne University Hospital, University of Berne, Berne, Switzerland
6. Department of Surgery, Kantonsspital Graubünden, Chur, Switzerland
7. Department of Infectious Diseases, University Hospital Berne, Berne, Switzerland