Intra-aortic balloon pump does not influence cerebral hemodynamics and neurological outcomes in high-risk cardiac patients undergoing cardiac surgery: an analysis of the IABCS trial - Caldas, Juliana R; Panerai, Ronney B; Bor-seng-shu, Edson; Ferreira, Graziela S. R; Camara, Ligia; Passos, Rogerio H; Salinet, Angela M; Azevedo, Daniel S; Galas, Filomena Regina Barbosa Gomes; Hajjar, Ludhmila Abrahão (Annals of intensive care, 2019)