1. 2nd Department of Psychiatry, National and Kapodistrian University of Athens, “Attikon” University General Hospital, 12 462 Athens, Greece
2. Department of Psychiatry, “Evangelismos” General Hospital, 106 76 Athens, Greece
3. Department of Psychology, Panteion University of Social and Political Sciences, 176 71 Athens, Greece
4. Center for Clinical Epidemiology and Outcomes Research, 15 451 Athens, Greece