O. G. Shaker, M. F. Ismail, E. Ashour, H. M. Yousif, M. Afify, and W. Gouda, “ACE gene polymorphism and serum ACE level with Progression of Nephropathy in Type 2 Diabetic Patients”, JAC, vol. 9, no. 3, pp. 2023–2032, Dec. 2013.