Description and validation of a preference test system to evaluate housing conditions for laboratory mice
Patterns of infection in patients with aplastic anemia and the emergence of Aspergillus as a major cause of death
CDC definitions of nosocomial surgical site infections, 1992: a modification of CDC definitions of surgical wound infections
Nosocomial infection rates for interhospital comparison: limitations and possible solutions. A Report from the National Nosocomial Infections Surveillance (NNIS) System.