1. KFJ Ng, SL Tsui, WS Chan. Prevalence of chronic pain in Hong Kong adults. Hong Kong Med J 2007;13(Suppl 2):S28-9.
2. 長期痛症：醫院管理局，聯科痛症治療工作小組Available at http://www.hkpainsociety.org/public%20info/HA%20Task%20Force%20FAQ%20Chi.pdf
3. Pain: Current Understanding of Assessment, Management, and Treatments. American Pain Society. Available at :https://issuu.com/damondouglas/docs/pain.
4. 長期痛症知多啲︰香港醫院管理局，聯科綜合痛症洽理專責小組Available at : http://www21.ha.org.hk/smartpatient/SPW/static/migration/files/PDF/painbooklet_2nd_edition.pdf.
10. Exercises to manage pain. Arthritis Research UK. Available at :
https://www.versusarthritis.org/about-arthritis/managing-symptoms/exercise/exercises-to-manage-pain/
11. IMS data 2015
12. Herbert S. B. Baraf, Morris S. Gold, Michael B. Clark, et.al. Safety and Efficacy of Topical Diclofenac Sodium 1% Gel in Knee Osteoarthritis: A Randomized Controlled Trial. ISSN. 2010 June, 2(38) 0091-3847.
13. Voltex Kool Product Insert
14. Voltex Analgesic Balm Product Insert
16.Non-Surgical Management of Knee Osteoarthritis. OARSI. Available at : https://www.oarsi.org/sites/default/files/library/2014/pdf/patientsumfinal.pdf
17. About Exercise. Arthritis Research UK. Available at : https://www.versusarthritis.org/about-arthritis/managing-symptoms/exercise/about-exercise
*根據OARSI國際骨關節協會，首選療法為tropical pain medications and ointment locally