1. Clinical policy for the initial approach to adolescents and adults presenting to the emergency department with a chief complaint of headache;American College of Emergency Physicians;Ann Emerg Med,1996
2. How good is a negative cranial computed tomographic scan result in excluding subarachnoid hemorrhage?;Edlow;Ann Emerg Med,2000
3. The origins, benefits, harms, and implications of emergency medicine clinical policies;Schriger;Ann Emerg Med,1993
4. Head pain: diagnosis and management;Diamond;Clin Symp,1994
5. Neurogenic inflammation in the pathophysiology and treatment of migraine;Moskowitz;Neurology,1993