1. Bacterial Diseases Laboratory New York State Department of Health, Wadsworth Center Albany New York USA
2. Department of Medicine University of California San Francisco San Francisco California USA
3. Department of Medicine Emory University School of Medicine Atlanta Georgia USA
4. Department of Epidemiology and Public Health University of Maryland Medical Center Baltimore Maryland USA
5. Department of Medicine University of Pennsylvania Philadelphia Pennsylvania USA
6. Department of Medicine Weill Cornell Medicine New York New York USA
7. Department of Medicine Massachusetts General Hospital Boston Massachusetts USA
8. Division of Healthcare Quality Promotion Centers for Disease Control and Prevention Atlanta Georgia USA