Ruangritchankul, Sirasa, and Orapitchaya Krairit. “Chronic Pain Assessment in the Elderly”. Ramathibodi Medical Journal 41, no. 3 (October 10, 2018): 92–99. Accessed April 26, 2024. https://he02.tci-thaijo.org/index.php/ramajournal/article/view/105204.