Plengpanich, P. 2019. Comparison of the Efficacy between Dexmedetomidine plus Morphine Patient-Controlled Analgesia (PCA) and Morphine Patient-Controlled Analgesia (PCA) Alone for Pain Control in Postoperative Valvular Heart Surgery. Thai Journal of Anesthesiology. 46, 1 (Dec. 2019), 20–25.