Risk Factors of Cerebral Vein and Sinus Thrombosis
Front Neurol Neurosci 23:23-54, de Freitas, G.R. & Bogousslavsky, J., 2008
Central Retinal Artery Occlusion and Oral Contraceptives
Indian J Ophthalmol 47:35-36, Mehta,C., 1999
Haemorrhagic Stroke, Overall Stroke Risk & Combined Oral Contraceptives:Internat'l Multicentre Study
Lancet 348:505-510, Poulter,N.R.,et al, 1996