Perimesencephalic Nonaneurysmal Hemorrhage Associated With Vein of Galen StenosisNeurol 70:2410-2411, Mathews,M.S.,et al, 2008
Circadian Fluctuations in Onset of Subarachnoid HemorrhageStroke 28:805-808, Vermeer,S.E.,et al, 1997