The Effects of Prolonged Cardiopulmonary Bypass on Cell-Mediated Immunity - De Angeli, S; Paccagnella, A; Mordacchini, M; Frugoni, C; Zanardo, G; Turolla, L; Calò, M A; Rosi, P; Nieri, A; Simini, G (The Thoracic and Cardiovascular Surgeon, 1994)