1. Department of Psychiatry, Psychotherapy and Psychosomatics, Psychiatric University Hospital Zurich, University of Zurich, Zurich, Switzerland
2. Department of Psychiatry, University of California San Diego, San Diego, California
3. Regional Affective Disorders Service, Cumbria Northumberland Tyne and Wear NHS Foundation Trust, Newcastle, UK
4. Exercise Sport and Rehabilitation Therapies, University of Sunderland, Sunderland, UK
5. Institute for Social and Preventive Medicine, University of Bern, Bern, Switzerland
6. Clinic for Depression and Anxiety, Psychiatric Centre Münsingen, Switzerland