Mukhopadhyay, Bhubandeep, and P. Banerjee. “A Unique Study of Post Mitral Valve Surgery Status of Patients in Pre and Intra COVID-19 Era”. International Journal of Research in Medical Sciences 10, no. 2 (January 29, 2022): 470–476. Accessed March 26, 2026. https://www.msjonline.org/index.php/ijrms/article/view/10443.