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. http://www.wheelessonline.com/ortho/swan_neck_deformity
11. http://emedicine.medscape.com/article/327453-overview
12. http://www.wheelessonline.com/ortho/atlantoaxial_subluxation_in_ra
13. http://www.wheelessonline.com/ortho/atlantoaxial_subluxation_in_ra
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
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. http://www.arthritis.org/conditions-treatments/disease-center/juvenile–arthritis/
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. http://www.wheelessonline.com/ortho/ulnar_drift_of_mp_joints
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. http://www.wheelessonline.com/ortho/rheumatoid_arthritis_flexor_tendon_rupture
34. http://www.wheelessonline.com/ortho/synovial_fluid