The benefit of a preoperative respiratory protocol and musculoskeletal exercise in patients undergoing cardiac surgery - Nardi, Paolo; Pisano, Calogera; Altieri, Claudia; Buioni, Dario; Pedicelli, Carlo; Saulle, Silvia; Dandi, Romana; Romano, Alessia; Servadio, Annamaria; Gianlorenzi, Alessandra; Emili, Katia; Ruvolo, Giovanni (Kardiochirurgia i Torakochirurgia Polska/Polish Journal of Thoracic and Cardiovascular Surgery, 2020)