Raja Omar, Raja Muhammad. “Risk Factors Associated With Nasopharyngeal Carcinoma in Sabah: Study Protocol of a Case Control Study”. Borneo Journal of Medical Sciences (BJMS) 12 (September 24, 2018): 43. Accessed May 14, 2024. https://jurcon.ums.edu.my/ojums/index.php/bjms/article/view/1386.