PT - JOURNAL ARTICLE ED - , TI - Discussion to the paper by J. S. S. Stewart AID - 10.1136/pgmj.45.526.522 DP - 1969 Aug 01 TA - Postgraduate Medical Journal PG - 522--522 VI - 45 IP - 526 4099 - http://pmj.bmj.com/content/45/526/522.short 4100 - http://pmj.bmj.com/content/45/526/522.full SO - Postgrad Med J1969 Aug 01; 45