Relationship between admission selection tools and student attrition in the early years of medical school oleh Ashraf F. Hefny, MSc, MRCS, MMEd (Dundee), FACS, Taleb M. Almansoori, MD, Margaret El-Zubeir, PhD, Alia AlBawardi, MD, Sami Shaban, PhD, Mohi Eldin Magzoub, PhD, Taoufik Zoubeidi, PhD, Nirmin A. Mansour, MD