1. Second Department of Psychiatry; Medical School; University General Hospital ‘ATTIKON’; National and Kapodistrian University of Athens; Athens Greece
2. Department of Hygiene, Epidemiology and Medical Statistics; Medical School; National and Kapodistrian University of Athens; Athens Greece
3. Cognition, Schizophrenia, Imaging Laboratory; Department of Psychosis Studies; Institute of Psychiatry, Psychology and Neuroscience, King's College London; London UK