PT - JOURNAL ARTICLE ED - , TI - Canadian Immunization Guide DP - 1989 Aug 01 TA - Canadian Medical Association Journal PG - 227--228 VI - 141 IP - 3 4099 - http://www.cmaj.ca/content/141/3/227.short 4100 - http://www.cmaj.ca/content/141/3/227.full SO - CMAJ1989 Aug 01; 141