RT Journal Article SR Electronic T1 The Common Headache Syndromes JF Neurology JO Neurology FD Lippincott Williams & Wilkins SP 810 OP 810 DO 10.1212/WNL.13.9.810 VO 13 IS 9 YR 1963 UL http://n.neurology.org/content/13/9/810.1.abstract AB