Utaipiboon, S., S. Jarasdamrongwat, S. Somyaraj, and S. Srivilai. “Change of Orthopedics Referred Cases to Chiang Rai Regional Hospital During 2003-2007”. Journal of Health Science of Thailand, vol. 17, no. Sup.5, Dec. 2018, pp. SV1419-1427, https://thaidj.org/index.php/JHS/article/view/5305.