Spaulding EH. The Role of chemical disinfection in the prevention of nosocomial infections. In: PS Brachman and TC Eickof (ed). Proceedings of International Conference on Nosocomial Infections, 1970.Chicago, IL: American Hospital Association: 1971: 254-274. Ontario Ministry of Health and Long-Term Care. Best Practices For Cleaning, Disinfection and Sterilization In All Health Care Settings. 2006.