Popko, I. Y. and Dmytriiev, D. V. (2017) “Changes of immunological reactivity during surgery and in postoperative period depending on analgesic regimen”, Pain medicine, 2(1), pp. 28–33. Available at: https://painmedicine.org.ua/index.php/pnmdcn/article/view/43 (Accessed: 21 March 2026).