RT Journal Article SR Electronic T1 Top 10 differential diagnoses in family medicine: Headache JF Canadian Family Physician JO Can Fam Physician FD The College of Family Physicians of Canada SP 1733 OP 1733 VO 53 IS 10 A1 David Ponka A1 Michael Kirlew YR 2007 UL http://www.cfp.ca/content/53/10/1733.abstract AB