HYPOBARIC BUPIVACAINE (WITH FENTANYL 25 MCG) FOR UNILATERAL SPINAL AN ANAESTHESIA IN HIP FRACTURE SURGERY: A DOSE-RESPONSE STUDY COMPARING TWO DOSAGES. 5 MG VERSUS 7.5 MG. Journal of Pharmaceutical Negative Results. Published online December 30, 2022:2302-2311. Accessed June 24, 2026. https://www.pnrjournal.com/index.php/home/article/view/5788