On-pump versus off-pump coronary artery bypass surgery in patients older than 60 years: five-year follow-up of MASS III trial - Melo, Rodrigo Morel Vieira de; Hueb, Whady; Rezende, Paulo Cury; Lima, Eduardo Gomes; Hueb, Alexandre Ciappina; Ramires, José Antônio Franchini; Kalil Filho, Roberto (Journal of cardiothoracic surgery, 2014)