1. Department of Consultation-Liaison Psychiatry and Psychosomatic Medicine, University Hospital Zurich, and University of Zurich, Zurich, Switzerland
2. Department of Clinical and Health Psychology, University of Fribourg, Fribourg, Switzerland
3. Institute for Complementary and Integrative Medicine, University Hospital Zurich and University of Zurich, Zurich, Switzerland
4. Department of Clinical Psychology and Psychotherapy, University of Bern, Bern, Switzerland
5. Department of Cardiology, Clinic Barmelweid, Barmelweid, Switzerland
6. Clienia Schlössli AG, Oetwil Am See, Oetwil Am See, Switzerland