Guidelines for Environmental Infection Control in Health-Care Facilities : Recommendations of CDC and the Healthcare Infection Control Practices Advisory Committee (HICPAC)
Surgical site infection (SSI) rates in the United States, 1992-1998: the National Nosocomial Infections Surveillance System basic SSI risk index
Surgical wound infection rates by wound class, operative procedure, and patient risk index. National Nosocomial Infections Surveillance System