Dr. Sergio Aguilar-Gaxiola is considered an international expert on mental health in ethnic populations. Aguilar-Gaxiola was one of the principal investigators with the Mexican American Prevalence and Services Survey, the largest mental health study conducted in the United States on Mexican Americans. In that capacity, he identified the most prevalent mental health disorders in the Mexican American population of California’s Central Valley; showed that the rate of disorders increases the longer the individual resides in the United States; and determined that children of immigrants have even greater rates of mental disorders. He used this study to help Central Valley’s underserved populations achieve better access to mental health services.