1. Community Mental Health Centre, University Mental Health Research Institute (UMHRI), Athens, Greece
2. First Department of Psychiatry, Medical School, National & Kapodistrian University, Athens, Greece
3. Faculty of Social and Political Sciences, University of Peloponnese, Corinth, Greece
4. Centre for Health Services Research, Department of Hygiene, Epidemiology and Medical Statistics, Medical School, National & Kapodistrian University, Athens, Greece