7Stovner L J, Hagen K, Jensen R, et al. The global burden of headache: a documentation of headache prevalence and disability worldwide[J]. Cephalalgia, 2007, 27 (3) : 193-210.
8Estemalik E, Tepper S. Preventive treatment in migraine and the new US guidelines [J]. Neuropsychiatr Dis Treat, 2013, 9: 709-720.
9Conde R, Correa VS, Carmona F, et al. Chemical composition and therapeutic effects of Lippia alba (Mill.) N. E. Brown leaves hydro-alcoholic extract in patients with migraine [J]. Phytomedicine, 2011, 18 (14) : 1197-1201.
10Diener HC, Pfaffenrath V, Schnitker J, et al. Efficacy and safety of 6.25 mg t.i.d, feverfew CO2-extract (MIG-99) in migraine prevention-a randomized, double-blind, multicentre, placebo-controlled study [J]. Cephalalgia, 2005, 25 (11) : 1031-1041.