Vaibhav V. Intrathecal Isobaric Bupivacaine Fentanyl Mixture versus Hyperbaric Bupivacaine Fentanyl Mixture in Urological Procedures. AAN [Internet]. 2019Jun.30 [cited 2026Apr.29];4(1):138-41. Available from: https://www.aijournals.com/index.php/aan/article/view/2501