Surgical procedures in patients with single level cervical and lumbar disc herniation, treated at PHI University clinic for neurosurgery Skopje - Rendevski, Vladimir; Filipche, Venko; Chaparoski, Aleksandar; Mirchevski, Vladimir; Gavrilovska Dimovska, Aleksandra; Kostov, Milenko; Shumkovski, Robert; Shuntov, Blagoj; Kammiloski, Tomi; Elezi, Fatmir; Zupanoski, Aleksandar (My University, 2021)