Mitral valve repair: Is a flexible, closed implant superior to a semirigid open implant regarding to overall survival and quality of life? - Diaz Vazquez, DM; Läßle, C; Rosendahl, U; Bauer, S; Bauer, K; Dalladaku, F; Ennker, I; Ennker, J (The Thoracic and Cardiovascular Surgeon, 2012)