PT - JOURNAL ARTICLE AU - Jan Matthys AU - Marc De Meyere TI - Quality evidence important for quality guidelines AID - 10.1503/cmaj.110-2105 DP - 2010 Sep 21 TA - Canadian Medical Association Journal PG - 1449--1450 VI - 182 IP - 13 4099 - http://www.cmaj.ca/content/182/13/1449.5.short 4100 - http://www.cmaj.ca/content/182/13/1449.5.full SO - CMAJ2010 Sep 21; 182