El-Shahat Resk, M., M. Samir Mohammed, and A. Sobhy Emara. “The Relation Between the Timing of Coronary Angiography and Renal Function Post Coronary Artery Bypass Grafting”. The Egyptian Cardiothoracic Surgeon, Vol. 2, no. 1, Jan. 2020, pp. 21 -26, doi:10.35810/ects.v2i1.106.