Preoperative magnesium sulphate usage as a medical challenge in postoperative pain management. - Panovska Petrusheva A; Mojsova Miovska M; Jovanovski-Srceva M; Toleska M; Gavrilovska A.; Dimitrovski A; Mikjunovikj Lj; Golubikj-Nichevska S; Zafirova D (Department of Anesthesia and reanimation, Faculty of Medicine, Ss. Cyril and Methodius University, Skopje, Macedonia, 2018)