PT - JOURNAL ARTICLE ED - , TI - Letter: Hetatitis B antigen in screened blood units DP - 1974 May 04 TA - Canadian Medical Association Journal PG - 1008a--1008 VI - 110 IP - 9 4099 - http://www.cmaj.ca/content/110/9/1008a.short 4100 - http://www.cmaj.ca/content/110/9/1008a.full SO - CMAJ1974 May 04; 110