Mixed venous versus central venous oxygen saturation in patients undergoing on pump beating coronary artery bypass grafting - Alshaer A, Abdel-Meguid ME, Ibraheim O, Fawzi K, AbdulSalam I, Sheta S, Abdullah KM, El-Demerdash A, Al-Satli R, AbdelAll M, Bakir BM, AlNahal N, Abdulrahman Y, AlHamoud H - Saudi J Anaesth