PT - JOURNAL ARTICLE AU - Sebastian Schneeweiss AU - Colin Dormuth TI - Reference-based refinements DP - 2003 Apr 29 TA - Canadian Medical Association Journal PG - 1115--1115 VI - 168 IP - 9 4099 - http://www.cmaj.ca/content/168/9/1115.1.short 4100 - http://www.cmaj.ca/content/168/9/1115.1.full SO - CMAJ2003 Apr 29; 168