TY - JOUR T1 - Difficult balance being gatekeepers JF - Canadian Family Physician JO - Can Fam Physician SP - 993 LP - 993 VL - 57 IS - 9 AU - John L. de Couto Y1 - 2011/09/01 UR - http://www.cfp.ca/content/57/9/993.2.abstract N2 - ER -