Outcomes of elderly patients undergoing emergency surgery for complicated colorectal cancer: a retrospective cohort study - Menegozzo, Carlos Augusto Metidieri; Teixeira-junior, Frederico; Couto-netto, Sergio Dias do; Martins-junior, Octacilio; Bernini, Celso de Oliveira; Utiyama, Edivaldo Massazo (Clinics, 2019)