A comparative study on the effect of intrathecal nalbuphine and buprenorphine as an adjuvant to 0.5% hyperbaric bupivacaine in elective infraumbilical surgeries. SJHR-Africa [Internet]. 2024 Nov. 30 [cited 2026 Aug. 13];5(11):5. Available from: https://sjhrafrica.org.sjhresearchafrica.org/index.php/public-html/article/view/1812