1 Division of Infection Control/Hospital Epidemiology, Silverman Institute for Health Care Quality and Safety, Beth Israel Deaconess Medical Center, Boston, Massachusetts.
2 Department of Hospital Epidemiology and Infection Prevention, University of California San Francisco, San Francisco, California.
3 Department of Psychiatry, Beth Israel Deaconess Medical Center, Boston, Massachusetts.
4 Division of Infectious Diseases, Beth Israel Deaconess Medical Center, Boston, Massachusetts.