Srettabunjong, Supawon, Amnaj Kusalanan, Pacharapol Udomkiat, and Chakarg Pongurgsorn. 2005. “Disability Evaluation in Posttraumatic Chronic Joint Pain Patients”. Siriraj Medical Journal 57 (7):375-81. https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/245603.