PT - JOURNAL ARTICLE ED - , TI - New expanded guidelines for preventing HIV DP - 1999 Jul 27 TA - Canadian Medical Association Journal PG - 122--122-a VI - 161 IP - 2 4099 - http://www.cmaj.ca/content/161/2/122.2.short 4100 - http://www.cmaj.ca/content/161/2/122.2.full SO - CMAJ1999 Jul 27; 161