3Bell DM. Occupational risk of human immunodeficiency virus in- fection in healthcare workers: an overview[ J ]. Am J Med, 1997, 102(5B) :9 - 15.
4Center for Disease Control and Prevention. Public health service guidelines for the management of health-care worker exposure to HIV and recommendations for postexposure prophylaxis [ J ]. MM- WR, 1998, 47(RR-7) :1 -33.
