Does bone wax make sense in off-pump coronary surgery? A prospective randomized study - Sorm, Zdenek; Vobornik, Martin; Dergel, Martin; Cermakova, Eva; Harrer, Jan; Gofus, Jan (Kardiochirurgia i Torakochirurgia Polska/Polish Journal of Thoracic and Cardiovascular Surgery, 2023)