e headaches. In: Wolffs headache and other head pain, Silberstein SD, Lipton RB, Dalessio DJ. (Eds), Oxford University Press, New York 2001. p.417. Murros K Fogelholm R. Spontaneous intracranial hypotension with slit ventricles. J Neurol 62 Neurosurg Psychiatry 1983. 46:1149. Headache Classification Subcommittee of the Internat