“25. SOME FACTORS RELATED TO SLEEP DISORDERS IN HEAD AND NECK CANCER PATIENTS AT K HOSPITAL ”. Vietnam Journal of Community Medicine 66, no. CĐ7-HNKH Bệnh viện K (May 22, 2025). Accessed September 9, 2026. https://tapchiyhcd.vn/index.php/yhcd/article/view/2406.