1. Oak Ridge Associated Universities, Atlanta (Moore, Spencer); Health, Economics, Environment, and Development Division, ICF, Atlanta (Timpe, Murray, Tripathi, McConnell, Iachan); Division of Adolescent and School Health, National Center for HIV, Viral Hepatitis, STD, and TB Prevention, Centers for Disease Control and Prevention (CDC), Atlanta (Rasberry, Hertz, Verlenden, Barrios, Pampati); Division of Population Health, National Center for Chronic Disease Prevention and Health Promotion, CDC, Atlanta (Lee).