Hilditch CA, Brinjikji W, Tsang A, Nicholson P, Kostynskyy A, Tymianski M, Krings T, Radovanovic I, Pereira V. Application of PHASES and ELAPSS scores to ruptured cerebral aneurysms: how many would have been conservatively managed? J Neurosurg Sci. 2021 Feb; 65(1):33-37.