4Juvela S. Natural history of unruptured intracranial aneurysms : risks for aneurysm formation, growth and rupture [ J ]. Acta Neurochir Suppl, 2002, 82: 27-30.
5Rinkel G J. Natural history, epidemiology and screening of unruptured intracranial aneurysms [ J]. J Neuroradiol. 2008, 35(2) : 99-103.