Sonothrombolysis for acute ischemic stroke: a systematic review of randomized controlled trials - Bor-Seng-Shu, Edson; Nogueira, Ricardo De Carvalho; Figueiredo, Eberval G.; Evaristo, Eli Faria; Conforto, Adriana Bastos; Teixeira, Manoel Jacobsen (Neurosurgical Focus, 2012)