Correspondence to Stephen D. Silberstein, M.D., F.A.C.P., Thomas Jefferson University Hospital, Jefferson Headache Center, Department of Neurology, Gibbon Building, Suite #8130, 111 South Eleventh Street, Philadelphia, PA 19107, USA. Tel: +1 215 955 2243; fax: +1 215 955 2060; e-mail: [email protected]
Abbreviations
AAC: aspirin, acetaminophen, and caffeine
CAD: coronary artery disease
CI: confidence interval
COC: combined oral contraceptive
ERT: estrogen replacement therapy
HRT: hormone replacement therapy
MAM: menstruation-associated migraine
MM: menstruation-related migraine
OC: oral contraceptive
OR: odds ratio