FORD, EARL; NELSON, KENRAD E.; WARREN, DORA; FORD EARL; Department of Preventive Medicine and Community Health, University of Illinois Medical Center; Center for Health Promotion and Education, Centers for Disease Control; NELSON KENRAD E.; Department of Preventive Medicine and Community Health, University of Illinois Medical Center; Department of Epidemiology, The Johns Hopkins University School of Hygiene and Public Health; WARREN DORA; Department of Epidemiology, The Johns Hopkins University School of Hygiene and Public Health; Department of Nursing, Section of Infection Control, University of Illinois Medical Center