Risk factor analysis of hospital mortality in patients with Endocarditis with ring abscess - Pomerantzeff, Pablo Maria Alberto; Brandão, carlos Manuel de Almeida; Albuquerque, João Marcelo; Oliveira Junior, José Lima; Dias, Altamiro Ribeiro; Mansur, Alfredo José; Grinberg, Max; Oliveira, Sérgio Almeida de (Journal of Cardiac Surgery, 2005)