Dmytriiev DV, Zaletska OA, Bortnik DI. Opioids in the treatment of non-specific acute and chronic pain. PMJUA [Internet]. 2019 Apr. 29 [cited 2026 Mar. 21];4(1):22-36. Available from: https://painmedicine.org.ua/index.php/pnmdcn/article/view/188