[1] Pfizer Hellas AE, Dept Med, Athens, Greece
[2] Democritus Univ Thrace, Univ Gen Hosp Alexandroupolis, Dept Psychiat, Alexandroupolis, Greece
[3] Aristotle Univ Thessaloniki, Dept Psychiat 3, GR-54006 Thessaloniki, Greece
[4] Aristotle Univ Thessaloniki, Dept Psychiat 1, GR-54006 Thessaloniki, Greece
[5] Univ Athens, Eginit Hosp, Sch Med, Dept Psychiat, GR-11528 Athens, Greece
[6] Sismanoglio Gen Hosp, Dept Psychiat, Athens, Greece