REPORT FROM THE 2009 AAN ANNUAL MEETING – An internet survey has been used to estimate the global prevalence of chronic migraine, defined as >15 headache days per month and a clinical diagnosis of migraine (Varon et al. AAN 2009; abstract P06.001).
REPORT FROM THE 2009 AAN ANNUAL MEETING – An internet survey has been used to estimate the global prevalence of chronic migraine, defined as >15 headache days per month and a clinical diagnosis of migraine (Varon et al. AAN 2009; abstract P06.001).