PT - JOURNAL ARTICLE ED - , TI - Residency rules hurt obstetrics, says editor DP - 1997 Apr 15 TA - Canadian Medical Association Journal PG - 1109--1109 VI - 156 IP - 8 4099 - http://www.cmaj.ca/content/156/8/1109.5.short 4100 - http://www.cmaj.ca/content/156/8/1109.5.full SO - CMAJ1997 Apr 15; 156