Appendix 1. MEDLINE Search Strategy

1. exp Heparin, Low‐Molecular‐Weight/

2. low molecular weight heparin.ti,ab.

3. (low molecular weight heparin or LMWH or nadroparin? or fraxiparin? or enoxaparin or Clexane or klexane or lovenox or dalteparin? or Fragmin or Kabi 2165 or Kabi2165 or FR 860 or FR860 or ardeparin or normiflo or tinzaparin or logiparin or Innohep or certoparin or sandoparin or reviparin or clivarin? or danaproid or danaparoid).ti,ab.

4. (antixarin or ardeparin? or bemiparin? or Zibor or cy 222 or cy222 or embolex or monoembolex or parnaparin? or rd 11885 or tedelparin or Kabi 2165 or Kabi2165).ti,ab.

5. (emt 966 or emt966 or emt 967 or emt967 or pk 10169 or pk10169).ti,ab.

6. (cy 216 or cy216 or seleparin? or tedegliparin or seleparin? or tedegliparin? or tedelparin).ti,ab.

7. (wy90493 or wy 90493).ti,ab.

8. (kb 101 or kb101 or lomoparan or orgaran).ti,ab.

9. (parnaparin or fluxum or lohepa or lowhepa or op 2123 or parvoparin).ti,ab.

10. (AVE5026 or AVE 5026).ti,ab.

11. or/1‐10

12. exp Injections, Subcutaneous/

13. subcutaneous.ti,ab.

14. 12 or 13

15. Contusions/

16. bruise?.ti,ab.

17. Hematoma/

18. hematoma?.ti,ab.

19. Pain/

20. pain.ti,ab.

21. or/15‐20

22. 11 and 14 and 21