1. Department of Psychiatry, University Hospital Jimenez Díaz Foundation, Madrid, Spain.
2. Department of Statistics, Universidad Carlos III, Getafe, Madrid, Spain.
3. Department of Psychiatry, Madrid Autonomous University, Madrid, Spain.
4. Massachusetts General Hospital, Disparities Research Unit and Harvard Medical School, Boston, Massachusetts.
5. Department of Psychiatry, University Hospital Rey Juan Carlos, Mostoles, Spain.
6. Department of Psychiatry, General Hospital of Villalba, Madrid, Spain.
7. Department of Psychiatry, University Hospital Infanta Elena, Valdemoro, Spain.