Does Concomitant Tricuspid Valve Repair Elevate the Operative Risk Due to Prolonged Time of Surgery in Patients with Minimally Invasive Mitral Valve Repair? - Pfannmüller, B.; Davierwala, P.; Misfeld, M.; Bakhtiary, F.; Mohr, F.-W. (The Thoracic and Cardiovascular Surgeon, 2017)