1. Department of Psychiatry, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0849, USA
2. Division of Global Public Health, Department of Medicine, University of California, San Diego, 10111 N. Torrey Pines Road, La Jolla, CA 92093-0507, USA
3. Prevencasa, Avenida Baja California 7580, Zona Norte, 22000 Tijuana, BC, Mexico
4. El Colegio de La Frontera Norte-Secretaria de Salud, Carretera Escenica Tijuana-Ensenada, Km. 18.5, San Antonio del Mar, 22560 Tijuana, BC, Mexico