1. Centers for Disease Control and Prevention (2019) Frequently asked questions (FAQs) about arthritis | CDC. Centers for Disease Control and Prevention. https://www.cdc.gov/arthritis/basics/faqs.htm. Accessed 31 Oct 2019
2. Arthritis Society (2019) What is arthritis | Arthritis Society. Arthritis Society. https://arthritis.ca/about-arthritis/what-is-arthritis. Accessed 31 Oct 2019
3. Arthritis Foundation (2019) What Is arthritis? Arthritis Foundation. https://www.arthritis.org/about-arthritis/understanding-arthritis/what-is-arthritis.php. Accessed 31 Oct 2019
4. American College of Rheumatology (2019) Prevalence statistics. American College of Rheumatology. https://www.rheumatology.org/Learning-Center/Statistics/Prevalence-Statistics. Accessed 31 Oct 2019
5. National Center for Complementary and Integrative Health (2017) Arthritis. NCCIH. https://nccih.nih.gov/health/arthritis. Accessed 11 Feb 2020