“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”. (2022) Journal of Pharmaceutical Negative Results, pp. 2312–2319. Available at: https://www.pnrjournal.com/index.php/home/article/view/5789 (Accessed: 24 June 2026).