Method to calculate the protamine dose necessary for reversal of heparin as a function of activated clotting time in patients undergoing cardiac surgery - Suárez Cuenca, J; Gayoso Diz, P; Gude Sampedro, F; Gómez Zincke, J M; Rey Acuña, H; Fontanillo Fontanillo, M M (J Extra Corpor Technol, 2013)