PT - JOURNAL ARTICLE ED - , DP - 1974 Feb 16 TA - Canadian Medical Association Journal PG - 385B--385B VI - 110 IP - 4 4099 - http://www.cmaj.ca/content/110/4/385B.short 4100 - http://www.cmaj.ca/content/110/4/385B.full SO - CMAJ1974 Feb 16; 110