Author: Brown RD Jr, Forbes GS, Huston J 3rd, Jaeger L, Kassell NF, Kongable-Beckman GL, Meissner I, Nichols D, O'Fallon WM, Peacock J, Piepgras DG, Thielen K, Torner JC; International Study of Unruptured Intracranial Aneurysms Investigators, Whisnant JP, Wiebers DO