PT - JOURNAL ARTICLE ED - , DP - 1972 Jul 08 TA - Canadian Medical Association Journal PG - 16A--16A VI - 107 IP - 1 4099 - http://www.cmaj.ca/content/107/1/16A.short 4100 - http://www.cmaj.ca/content/107/1/16A.full SO - CMAJ1972 Jul 08; 107