1. 3rd Department of Psychiatry, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece;
2. Department of Psychiatry and Psychotherapy, Semmelweis University, Budapest, Hungary;
3. Private practice, Volos, Greece;
4. Universitätsklinik für Psychiatrie und Psychotherapie, Medizinische Universität Wien, Vienna, Austria