TY - JOUR T1 - A comprehensive approach needed to address regional variation JF - Canadian Medical Association Journal JO - CMAJ SP - E840 LP - E840 DO - 10.1503/cmaj.733075 VL - 189 IS - 24 AU - Charles Gardner AU - Lisa Simon AU - Penny Sutcliffe AU - Lawrence C. Loh AU - Lynn Noseworthy AU - Rosana (Pellizzari) Salvaterra AU - Kit Young-Hoon Y1 - 2017/06/19 UR - http://www.cmaj.ca/content/189/24/E840.abstract N2 - ER -