Affiliation: | (1) Centers for Disease Control and Prevention, Epidemiology Program Office, Division of Public Health Surveillance and Informatics, Surveillance Systems Branch, 30333 Atlanta, Georgia, USA;(2) Centers for Disease Control and Prevention, National Center for HIV, STD, & TB Prevention, Division of STD Prevention, Statistics and Data Management Branch, 30333 Atlanta, Georgia, USA;(3) Surveillance Systems Branch, USA |