Gafla, Parveen. “Retracted: Comparison of Effect of Intrathecal Fentanyl 25µg With 0.5% Hyperbaric Bupivacaine and Only 0.5% Hyperbaric Bupivacaine”. International Journal of Clinical Anesthesia and Research (April 12, 2025): 017–022. Accessed December 13, 2025. https://www.anesthesiaresjournal.com/index.php/ijcar/article/view/ijcar-aid1029.