Use of the six-minute walk test in exercise prescription in male patients after coronary artery bypass surgery - Dolecińska, Dorota; Przywarska, Izabela; Podgórski, Tomasz; Dylewicz, Piotr; Lewandowski, Jacek (Kardiochirurgia i Torakochirurgia Polska/Polish Journal of Thoracic and Cardiovascular Surgery, 2020)