Sappayanon, Pavit. 2021. “Sleep Quality and Patient Satisfaction after Using Ketamine and Local Anesthetic for Supraclavicular Brachial Plexus Block in Patients Undergoing Upper Extremity Surgery”. Thai Journal of Anesthesiology 47 (4):323-30. https://he02.tci-thaijo.org/index.php/anesthai/article/view/252815.