Ghulam Murtaza Shaikh, Muhammad Muazzam Butt, Mohsin Riaz Askri, Eram Shahzadi, Shumyala Maqbool, Syed Imtiaz Ali Zaidi 2023. Analgesia after Lower Abdominal Surgery in Children Treated with Caudal Bupivacaine Versus a Bupivacaine-Tramadol Combination. Pakistan Journal of Medical & Health Sciences. 17, 11 (Nov. 2023), 137. DOI:https://doi.org/10.53350/pjmhs020231711137.