Udompornmongkol, V. (2018). The effect of intravenous dexmedetomidine to intrathecal bupivacaine on spinal block duration in orthopedic surgery: a double blind controlled study. Thai Journal of Anesthesiology, 43(4), 316–327. retrieved from https://he02.tci-thaijo.org/index.php/anesthai/article/view/110602