2Schwartzman K, Loo V, Pasztor J, et al. Tuberculosis infection among health care workers in Montreal. Am J Respir Crit Care Med, 1996,154(4Pt 1):1006 1012.
3Chung KC. Airborne contaminant exposure control in a partitioned work environment by exhaust ventilation systems. Am lnd Hyg Assoc J, 1998,59:346-352.
4Menzies D, Fanning A, Yuan L, et al. Hospital ventilation and risk for tuberculous infection in canadian health care workers. Canadian Collaborative Group in Nosocomial Transmission of TB. Ann Intern Med, 2000,133:779-789.
5World Health Organization Regional Otf[ce for the Western Pacific.Environmental health team reports on Amoy Gardens. 2003.Accessed March 26, 2004, at http://www. info. gov. hk/info/ap/who amoye, pdf.
6TS Yu, YG Li, TW Wong, et al. Evidence of airborne transmission of the severe acute respiratory syndrome virus ignatius.N Engl J Med, 2004,350: 1731-1739.
