1. Centers for Disease Control and Prevention, National Center for Environmental Health, Division of Laboratory Sciences, 4770 Buford Highway, NE, Atlanta, Georgia 30341, Centers for Disease Control and Prevention, National Center for Immunization and Respiratory Diseases, Division of Bacterial Diseases, 1600 Clifton Road, Atlanta, Georgia 30333, Battelle Memorial Institute under contract at the Centers for Disease Control and Prevention, 4770 Buford Highway, NE, Atlanta, Georgia 30341, and Centers for...