Appendix 1. MEDLINE search strategy

1. exp arthritis, rheumatoid/
2. (felty$ adj2 syndrome).tw.
3. (caplan$ adj2 syndrome).tw.
4. rheumatoid nodule.tw.
5. (sjogren$ adj2 syndrome).tw.
6. (sicca adj2 syndrome).tw.
7. still$ disease.tw.
8. bechterew$ disease.tw.
9. (arthritis adj2 rheumat$).tw.
10. or/1‐9
11. exp Shoulder/
12. exp Shoulder Joint/
13. exp Shoulder Pain/
14. shoulder$.tw.
15. exp Rotator Cuff/
16. rotator cuff.tw.
17. or/11‐16
18. exp surgery/
19. su.fs.
20. (surger$ or surgical or operation$).tw.
21. exp Arthroplasty/
22. (arthroplast$ or replac$ or resurfac$ or repair$).tw.
23. or/18‐22
24. and/10,17,23