RT Journal Article SR Electronic T1 The natural history and epidemiology of migraine and muscle contraction headache JF Neurology JO Neurology FD Lippincott Williams & Wilkins SP 11 OP 15 DO 10.1212/WNL.13.3_Part_2.11 VO 13 IS 3 Part 2 A1 Adrian M. Ostfeld YR 1963 UL http://n.neurology.org/content/13/3_Part_2/11.abstract AB