1. http://www.gustrength.com/glossary:diarthroses-or-synovial-joints

2. http://emedicine.medscape.com/article/331715-overview#aw2aab6b2b3

3. http://emedicine.medscape.com/article/331715-overview#aw2aab6b2b4

4. http://emedicine.medscape.com/article/331715-overview#aw2aab6b2b6

5. http://www.aafp.org/afp/2002/0315/p1073.html

6. http://radiopaedia.org/articles/musculoskeletal-manifestations-of-rheumatoid-arthritis

7. http://www.orthobullets.com/hand/6012/boutonniere-deformity

8. https://www.youtube.com/watch?v=G9HY0qXWUvE

9. http://emedicine.medscape.com/article/1238095-treatment

10. https://www.healthline.com/health/swan-neck-deformity

11. http://emedicine.medscape.com/article/327453-overview

12. https://www.orthobullets.com/spine/2049/atlantoaxial-instability

13. https://www.orthobullets.com/spine/2049/atlantoaxial-instability

14. http://www.ncbi.nlm.nih.gov/pubmed/9876790

15. http://radiopaedia.org/articles/protrusio-acetabuli-1

16. http://www.webmd.com/rheumatoid-arthritis/guide/rheumatoid-nodules

17. http://www.ncbi.nlm.nih.gov/pubmed/20493416

18. http://rarediseases.info.nih.gov/gard/8234/feltys-syndrome/resources/1

19. http://www.hopkinsarthritis.org/patient-corner/disease-management/rehabilitation-management-rheumatoid-arthritis-patients/

20. http://emedicine.medscape.com/article/331715-medication#2

21. http://emedicine.medscape.com/article/331715-medication#3

22. http://emedicine.medscape.com/article/331715-treatment#aw2aab6b6b3

23. https://www.mayoclinic.org/diseases-conditions/juvenile-idiopathic-arthritis/symptoms-causes/syc-20374082

24. https://www.mayoclinic.org/diseases-conditions/adult-stills-disease/symptoms-causes/syc-20351907

25. http://emedicine.medscape.com/article/1007276-overview#aw2aab6b2b5aa

26. http://emedicine.medscape.com/article/1209891-overview

27. http://emedicine.medscape.com/article/1007276-workup#aw2aab6b5b4

28. https://healthjade.net/ulnar-deviation/

29. http://emedicine.medscape.com/article/329734-overview

30. http://www.uptodate.com/contents/pauciarticular-onset-juvenile-idiopathic-arthritis

31. http://emedicine.medscape.com/article/1234293-treatment

32. http://emedicine.medscape.com/article/1287449-overview#aw2aab6b5

33. https://www.healio.com/orthopedics/journals/ortho/1994-3-17-3/%7B8eed9a3e-4f90-4ec0-b87e-f6005e17aa4f%7D/spontaneous-rupture-of-digital-flexor-tendons

34. https://www.medscape.com/answers/331715-5441/which-synovial-fluid-analysis-findings-suggest-rheumatoid-arthritis-ra