Dr. Kiranmye Mukku; Dr. Shameem Sunkesula; Dr. Janaki Subhadra Peyyety; Dr. Madhusudan Mukkara; Dr. Srikant Inturi. Comparison of the Efficacy of Three Different Opioids As Adjuvants to Hyperbaric Bupivacaine for Subarachnoid Block in Lower Limb Orthopedic Surgeries - A Prospective Randomized and Double Blind Study. IJPRT 2026, 16, 2733-2743.