Edwards Jonathan R, Peterson Kelly D, Andrus Mary L, Dudeck Margaret A, Pollock Daniel A, Horan Teresa C
National Center for Preparedness, Detection, and Control of Infectious Diseases, Centers for Disease Control and Prevention, Public Health Service, US Department of Health and Human Services, Atlanta, GA 30333, USA.
Am J Infect Control. 2008 Nov;36(9):609-26. doi: 10.1016/j.ajic.2008.08.001.