Appendix 1. Search strategies

 MEDLINE(OVID) search strategy (from inception to the present):

1. exp. arthritis, psoriatic/

2. (arthr$ adj2 psoria$).tw.

3. Psoriasis, arthritis

4. psoriasis, arthritic

5. psoriasis, arthropathica

6. psoriatic, arthropathy

7. psoriatic, arthropathies

8. or/1‐7

9. randomized controlled trial.pt.

10. controlled clinical trial.pt.

11. randomized.ab.

12. placebo.ab.

13. clinical trial as topic.sh.

14. randomly.ab.

15. trial.ti.

16. or/9‐15

17. exp animals/not humans.sh.

18. 16 not 17

19. Antibodies, monoclonal/tu

20. Ustekinumab.mp.

21. Stelara.tw.

22. CNTO 1275.mp.

23. Antibody, monoclonal, humanized/tu

24. or/17‐23

25. Antibody, monoclonal, humanized/tu

26. Secukinumab.mp.

27. AIN 457 .mp.

28. anti interleukin‐17A.tw.

29. or/25‐28

30. Antibody, monoclonal, humanized/tu

31. Brodalumab.m.p.

32. AMG‐827.mp.

33. anti‐interleukin‐17‐receptor.tw.

34. or/30‐33

35. antibody, monoclonal, humanized/tu

36. ixekizumab.mp.

37. LY2439821.mp.

38. anti ‐interleukin‐17.tw.

39. or/35‐38

40. 8 and 18 and 24 and 29 and 34 and 39