title: The state of the science.
authors.affiliation: University of Virginia Health System, 1004 Cobb Hall, Hospital Drive, PO Box 800473, Charlottesville, VA 22908-0473, USA.
authors.forename: Barry M
authors.initials: BM
authors.lastname: Farr
mesh_terms: D006801:Humans; D017053:Infection Control; D010506:Periodicals as Topic; D012107:Research Design; D012586:Science