Anshuman Shukla, Sumita Kumari, Vinita Singh, Satyajeet Verma, Sujeet Rai. Comparison of Hypobaric Bupivacaine, With and Without Fentanyl for Patients Undergoing Surgeries around Hip: A Randomized Double Blind Study from North India. AAN [Internet]. 2020May22 [cited 2024Apr.27];5(1):52-6. Available from: http://aijournals.com/index.php/aan/article/view/1473