RT Journal Article SR Electronic T1 Headache mechanisms, with particular reference to migraine JF Neurology JO Neurology FD Lippincott Williams & Wilkins SP 1 OP 6 DO 10.1212/WNL.13.3_Part_2.1 VO 13 IS 3 Part 2 A1 E. Charles Kunkle YR 1963 UL http://n.neurology.org/content/13/3_Part_2/1.abstract AB