TY - JOUR T1 - Top 10 differential diagnoses in family medicine: Headache JF - Canadian Family Physician JO - Can Fam Physician SP - 1733 LP - 1733 VL - 53 IS - 10 AU - David Ponka AU - Michael Kirlew Y1 - 2007/10/01 UR - http://www.cfp.ca/content/53/10/1733.abstract N2 - ER -