Pongchapoa, Panee, Khochakron Palachewa, Sagheemas Kaewkot, Sunantha Panginda, Nongyao Reawsa, and Somboon Thienthong. 2013. “Pain Score Recording As the Fifth Vital Sign Experience at Orthopedic Surgical Wards, Srinagarind Hospital”. Srinagarind Medical Journal 21 (3):182-87. https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/13215.