“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, pp. 2302–2311, Dec. 2022, Accessed: Jun. 08, 2026. [Online]. Available: https://pnrjournal.com/index.php/home/article/view/5788