Major risk factors for aneurysmal subarachnoid hemorrhage in the young are modifiable - Broderick, JP; Viscoli, CM; Brott, T; Kernan, WN; Brass, LM; Feldmann, E; Morgenstern, LB; Wilterdink, JL; Horwitz, RI; Hemorrhagic Stroke Project Investigators (Stroke, 2003)