Prevalence of diabetes mellitus among patients with subarachnoid hemorrhage. Arch Neurol. 1984;41:1033 1035. 29. Wiebers DO, Whisnant JP, Huston J 3rd, Meissner I, Brown RD Jr, Piepgras DG, Forbes GS, Thielen K, Nichols D, O Fallon WM, Peacock J, Jaeger L, Kassell NF, Kongable-Beckman GL, Torner JC; Interna- tional Study of Unruptured Intracranial Aneurysms Investigators. Unruptured intracranial aneurysms: natural history, clinical outcome, and risks of surgical and endovascular treatment. Lancet. 2003;362: 103 110. 30. Lindner SH, Bor AS, Rinkel GJ. Differences in risk factors according to the site of intracranial aneurysms. J Neurol Neurosurg Psychiatry. 2010;81:116 118. 31. Etminan N, Beseoglu K, Steiger HJ, Ha nggi D. The impact of hyper- tension and nicotine on the size of ruptured intracranial aneurysms. J Neurol Neurosurg Psychiatry. 2011;82:4 7. 32. Shiue I, Arima H, Anderson CS; ACROSS Group. Life events and risk of subarachnoid hemorrhage: the Australasian Cooperative Research on Subarachnoid Hemorrhage Study (ACROSS). Stroke. 2010;41: 1304 1306. 33. Lall RR, Eddleman CS, Bendok BR, Batjer HH. Unruptured intracranial aneurysms and the assessment of rupture risk based on anatomical and morphological factors: sifting through the sands of data. Neurosurg Focus. 2009;26:E2. 34. Hirsch KG, Froehler MT, Huang J, Ziai WC. Occurrence of perimes- encephalic subarachnoid hemorrhage during pregnancy. Neurocrit Care. 2009;10:339 343. 35. Tiel Groenestege AT, Rinkel GJ, van der Bom JG, Algra A, Klijn CJ. The risk of aneurysmal subarachnoid hemorrhage during pregnancy, delivery, and the puerperium in the Utrecht population: case-crossover study and standardized incidence ratio estimation. Stroke. 2009;40: 1148 1151. 36. Aoki T, Nishimura M. Targeting chronic inflammation in cerebral an- eurysms: focusing on NF-kappaB as a putative target of medical therapy. Expert Opin Ther Targets. 2010;14:265 273. 37. 