1. Section of Psychiatry; Department of Neuroscience; University of Parma; Parma Italy
2. Mood Disorders Program; Tufts Medical Center; Boston MA USA
3. School of Medicine-Public Health Unit; University of Parma; Parma Italy
4. Department of Global Health and Social Medicine; Harvard Medical School; Boston MA USA
5. First Department of Psychiatry; Eginition Hospital; Athens University Medical School; Athens Greece
6. Departments of Psychiatry and Pharmacology; Mood Disorders Program; Tufts Medical Center; Tufts University Medical School; Boston MA USA