1. Department of Psychiatry and Psychotherapy School of Medicine Klinikum rechts der Isar Technical University of Munich Munich Germany
2. 3rd Department of Psychiatry School of Medicine Aristotle University of Thessaloniki Thessaloniki Greece
3. Department of Psychiatry, Psychosomatic Medicine and Psychotherapy Social Foundation Bamberg Teaching Hospital of the University of Erlangen Erlangen Germany
4. Institute of Social and Preventive Medicine (ISPM) University of Bern Bern Switzerland