อินทร์แก้ว ช. Effectiveness of the program to reduce knee pain in osteoarthritis elderly patients in Chang-sai health promotion hospital. Reg11MedJ [internet]. 2019 Apr. 1 [cited 2026 Sep. 20];33(2):293-302. available from: https://he02.tci-thaijo.org/index.php/Reg11MedJ/article/view/215840