Hilditch CA, Nicholson P, Murad MH, Rabinstein A, Schaafsma J, Pikula A, Krings T, Pereira VM, Agid R, Brinjikji W. Endovascular Management of Acute Stroke in the Elderly: A Systematic Review and Meta-Analysis. AJNR Am J Neuroradiol. 2018 05; 39(5):887-891.