TY - JOUR T1 - Quality evidence important for quality guidelines JF - Canadian Medical Association Journal JO - CMAJ SP - 1449 LP - 1450 DO - 10.1503/cmaj.110-2105 VL - 182 IS - 13 AU - Jan Matthys AU - Marc De Meyere Y1 - 2010/09/21 UR - http://www.cmaj.ca/content/182/13/1449.5.abstract ER -