Kassem, M., M. A. Amr, H. Elayouty, and E. A. Fayad. “Keeping the Mitral Smile: Is It Durable? A Comparative Study of Mid-Term Outcomes of Mitral Valve Repair and Mechanical Mitral Valve Replacement in Rheumatic Heart Patients”. The Egyptian Cardiothoracic Surgeon, Vol. 6, no. 3, May 2024, pp. 61 -66, https://journals.escts.net/ects/article/view/300.