TY - JOUR T1 - Positive reinforcement JF - Canadian Family Physician JO - Can Fam Physician SP - 222 LP - 222 VL - 56 IS - 3 AU - Gail Greenberg Y1 - 2010/03/01 UR - http://www.cfp.ca/content/56/3/222.1.abstract N2 - ER -