Chronic Daily Headache
NEJM 354:158-165, Dodick,D.W., 2006
What if the sexual headache is not a joke?
BJMP 3:304-308, Redelman, M., 2010
Oral Contraceptives and Increased Headache Prevalence, The Head-HUNT Study
Neurol 66:349-353, Aegidius,K.,et al, 2006