Risk of recurrent subarachnoid haemorrhage, death, or dependence and standardised mortality ratios after clipping or coiling of an intracranial aneurysm in the International Subarachnoid Aneurysm Trial (ISAT): long-term follow-up - Molyneux, A J; Kerr, R SC; Birks, J; ISAT Collaborators (Lancet Neurol, 2009)