Thienthong, S., Wongswadiwat, M., Krisanaprakornkit, W., Rattanasuwan Yimyam, P., Tantanatewin, W. and Khuntikeo, N. (2013) “A Development of Pain Assessment and Pain Documentation as a Fifth Vital Sign in a University Hospital”, Srinagarind Medical Journal, 22(2), pp. 158–164. Available at: https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/13134 (Accessed: 2 May 2024).