Yan, Juan, Zheng-zheng Xie, Na Ma, Mao-dong Zheng, Ting-ting Qiao, and Yu Wang. “Effects of Oxycodone Hydrochloride Sustained-Release Tablets and Morphine Hydrochloride Sustained-Release Tablets on Peripheral Blood T Cell Levels in Advanced Lung Squamous Cell Carcinoma With Moderate to Severe Cancer Pain”. Pakistan Journal of Medical Sciences 39, no. 5 (August 3, 2023). Accessed July 21, 2024. https://pjms.org.pk/index.php/pjms/article/view/6772.