Yousefshahi, F., K. Barkhordari, L. Mahdifar, A. Salehiomran, H. Majedi, and J. Zebardast. “The Effect of Preoperative Creatinine Clearances on Postoperative Oxygenation in Coronary Artery Bypass Grafting: A Cohort Study”. Acta Medica Iranica, Vol. 56, no. 12, Jan. 2019, pp. 750-6, http://acta.tums.ac.ir/index.php/acta/article/view/6961.