1. Department of Psychiatry; Columbia University; New York City New York
2. Department of Biostatistics; Columbia University; New York City New York
3. Laboratory of Neurogenetics, National Institute on Alcohol Abuse and Alcoholism; National Institutes of Health; Bethesda Maryland
4. Psychiatric Clinic; Martin-Luther-Universität Halle-Wittenberg; Munich Germany
5. Centre de recherche de l'Institut universitaire en santé mentale de Québec and Département de médecine sociale et préventive; Université Laval; Quebec City Canada
6. Department of Psychiatry; McGill University; Montreal Canada