1. [1] Paget, S. A., Lockshin, M., & Loebl, S. (2002). The hospital for special surgery rheumatoid arthritis handbook. J. Wiley & Sons.
2. [2] Centers for Disease Control and Prevention. "Rheumatoid Arthritis (RA)". Retrieved from, https://www.cdc.gov/arthritis/basics/rheumatoid-arthritis.html
3. [3] National Herald (2020). "Know what is Rheumatoid Arthritis; 1 per cent of India’s population suffers from it". Retrieved from, https://www.nationalheraldindia.com/lifestyle/know-what-is-rheumatoid-arthritis-1-per-cent-of-indias-population-suffers-from-it
4. [4] Smolen, J. S., Aletaha, D., & McInnes, I. B. (2016). Rheumatoid arthritis. The Lancet, 388(10055), 2023–2038. https://doi.org/10.1016/S0140-6736(16)30173-8
5. [5] National Institutes of Health. "Rheumatoid Arthritis". Retrieved from, https://www.niams.nih.gov/health-topics/rheumatoid-arthritis