Graham Kalton, Westat; Ismael Flores Cervantes, Westat; Carlos Arieira, Westat; Mike Kwanisai, Westat; Jehun Kim, Westat; Elizabeth Radin, ICAP at Columbia University; Suzue Saito, ICAP at Columbia University; Anindya De, U.S. Centers for Disease Control and Prevention; Stephen McCracken, U.S. Centers for Disease Control and Prevention; Paul Stupp, U.S. Centers for Disease Control and Prevention