A bovine hemoglobin-based oxygen carrier as pump prime for cardiopulmonary bypass: reduced systemic lactic acidosis and improved cerebral oxygen metabolism during low flow in a porcine model. - McNeil JD; Propper B; Walker J; Holguin L; Evans L; Lee K; Fox PT; Michalek JE; Baisden CE (The Journal of thoracic and cardiovascular surgery, 2011)