1. Beatriz Salvesen von Essen is with the Centers for Disease Control and Prevention (CDC) Foundation, Atlanta, GA. Denise V. D’Angelo, Holly B. Shulman, Katherine Kortsmit, Aspy Taraporewalla, Leslie Harrison, and Lee Warner are with the CDC, Atlanta. Wanda Hernández Virella, Beatriz Ríos Herrera, Patricia García Díaz, and Manuel Vargas Bernal are with the Division of Maternal, Child, and Adolescent Health in the Puerto Rico Department of Health, San Juan.