Salahuddin, N. A. ., Md Arepen, S. A. ., Hitam, S. ., & Hassan, E. . (2021). The Effectiveness of the Malaysian Guidelines for Pre-operative COVID-19 Screening in ORL Patients Undergoing Elective Surgery. Ulum Islamiyyah, 33(2), 35–45. https://doi.org/10.33102/uij.vol33no1.283