Sakdanuwatwong, Supalak, Pornchai Sakdanuwatwong, Koravee Pasutharnchat, and Wanida Sodsee. “Measuring Service Quality of the Pain Clinic at Ramathibodi Hospital”. Ramathibodi Medical Journal 43, no. 1 (March 31, 2020): 35–46. Accessed May 6, 2024. https://he02.tci-thaijo.org/index.php/ramajournal/article/view/183794.