1. Division of Laboratory Systems, Public Health Practice Program Office and the Division of Bacterial and Mycotic Diseases, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Public Health Service, U. S. Department of Health and Human Services, Atlanta, Georgia
2. Division of Laboratory Systems, Public Health Practice Program Office and the Division of Bacterial and Mycotic Diseases, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Public Health Service, U. S. Department of Health and Human Services, Atlanta, Georgia; Health Education Services, Office of Health Communication, National Center for Infectious Diseases, Centers for Disease Control and Prevention, 1600 Clifton Rd., MS-C14, Atlanta, GA 30333