Initial clinical status and spot sign are associated with intraoperative aneurysm rupture in patients undergoing surgical clipping for aneurysmal subarachnoid hemorrhage - Burkhardt, J K; Neidert, M C; Mohme, M; Seifert, B; Regli, L; Bozinov, O (J Neurol Surg A Cent Eur Neurosurg, 2016)