Mitral Valve Prosthesis Dehiscence Necessitating Reoperation. An Analysis of the Risk Factors Involved* - Rizzoli, G; Russo, R; Resta, M; Valfré, C; Mazzucco, A; Brumana, T; Aru, G; Livi, U; Gallucci, V (The Thoracic and Cardiovascular Surgeon, 1983)