Wittayapairoj, Kriangkrai, Aumjit Wittayapairoj, and Kittipong Wittayapairoj. 2018. “Post-Operative Analgesic Efficacy of Single Injection of Bupivacaine on Iliac Crest Bone Harvesting Donor Site After Anterior Cervical Spine Fusion”. Srinagarind Medical Journal 33 (2):161-68. https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/115773.