Practice Parameter: Evaluation of Children and Adolescents With Recurrent Headaches
Neurol 59:490-498, Lewis,D.W.,et al, 2002
Severe Headaches, When to Worry, What To Do
Postgrad Med 83:164-180, Drexler,E.D., 1990
Headaches and Subarachnoid Haemorrhage
Editorial, Lancet 2:80-821988., , 1988