1 Center for Surveillance, Epidemiology and Laboratory Services, CDC, Atlanta, Georgia; Division of Cancer Control and Population Sciences, National Cancer Institute, Rockville, Maryland. Electronic address: muk1@cdc.gov.
2 Center for Surveillance, Epidemiology and Laboratory Services, CDC, Atlanta, Georgia; U.S. Public Health Service, Commissioned Corps, Washington, District of Columbia.
3 Division of Cancer Control and Population Sciences, National Cancer Institute, Rockville, Maryland.