1. Active Bacterial Core surveillance (ABCs) of the Emerging Infections Program Network, Respiratory Diseases Branch, Division of Bacterial and Mycotic Diseases, National Center for Infectious Diseases
2. Epidemic Intelligence Service, Epidemiology Program Office, Centers for Disease Control and Prevention, Atlanta, Georgia
3. Emerging Infections Program, San Francisco, California, and the School of Public Health, University of California, Berkeley, California
4. Emerging Infections Program, Veterans Affairs Medical Center and Emory University School of Medicine, Atlanta, Georgia