1 Lauren C. Zalla, Jessie K. Edwards, Stephen R. Cole, Tiffany L. Breger, and Arti Virkud are with the Department of Epidemiology, University of North Carolina, Chapel Hill. Jacqueline E. Rudolph is with the Department of Epidemiology, Emory University, Atlanta, GA. Anna Satcher Johnson and H. Irene Hall are with the Division of HIV/AIDS Prevention, Centers for Disease Control and Prevention, Atlanta, GA.