A DOSE-RESPONSE STUDY COMPARING TWO DOSAGES OF HYPOBARIC BUPIVACAINE (WITH FENTANYL 25 MCG) FOR UNILATERAL SPINAL AN ANAESTHESIA IN HIP FRACTURE SURGERY. A RANDOMIZED DOUBLE BLIND PROSPECTIVE COMPARATIVE STUDY OF 5 MG VERSUS 7.5 MG. Journal of Pharmaceutical Negative Results [Internet]. 2022 Dec. 30 [cited 2026 Jun. 3];:2312-9. Available from: https://www.pnrjournal.com/index.php/home/article/view/5789