Comparison of Bupivacaine Hydrochloride and Bupivacaine Hydrochloride with Tramadol Hydrochloride in Caudal Epidural Analgesia in Children Undergoing Infraumbilical Surgeries. AMMS [Internet]. 2025 Aug. 5 [cited 2025 Aug. 15];:800-3. Available from: http://ammspub.com/index.php/amms/article/view/289