1. Division of Global Public Health; Department of Medicine; University of California San Diego; La Jolla; CA; USA
2. School of Public Health; San Diego State University; San Diego; CA; USA
3. SADEC-FEMAP; Ciudad Juarez; Chihuahua; Mexico
4. Prevencasa A.C.; Tijuana; Baja California; Mexico
5. Colegio de la Frontera Norte; Tijuana; Baja California; Mexico