TY - JOUR T1 - Occupational exposure to the human immunodeficiency virus among health care workers in Canada JF - Canadian Medical Association Journal JO - CMAJ SP - 503 LP - 505 VL - 140 IS - 5 A2 - , Y1 - 1989/03/01 UR - http://www.cmaj.ca/content/140/5/503.abstract ER -