elizabeth loder, md, professor of neurology, harvard medical school; chief, division of headache, brigham & women's hospital..
it causes stroke and dementia as well as mood disturbance. svd increases with age but is accelerated by hypertension and diabetes..

it's not clear how well they'll stack up against current migraine therapies, because head-to-head studies haven't been done.. would identify hospitals that are best positioned to treat strokes and establish protocols for emergency responders handling stroke patients..

"we were quite surprised to find there were no significant differences," says study author