1. https://www.ottobockus.com/therapy/resources-for-prosthetics/what-are-k-levels.html

2. none

3. https://my.clevelandclinic.org/health/diagnostics/17840-ankle-brachial-index-abi/results-and-follow-up

4. none

5. none

6. https://www.amputee-coalition.org/resources/prosthetic-devices-for-upper-extremity-amputees/#:~:text=Voluntary%2Dopening%20means%20that%20users,strength%20of%20the%20rubber%20bands.

7. http://www.oandplibrary.org/alp/chap06-02.asp

8. none

9. none

10. http://www.oandplibrary.org/alp/chap25-01.asp

11. http://www.amputee-coalition.org/fact_sheets/definitions.html

12. none

13. https://pubmed.ncbi.nlm.nih.gov/28633785/

14. http://www.orthobullets.com/trauma/1052/amputations

15. none

16. none

17. https://www.ottobockus.com/therapy/resources-for-prosthetics/what-are-k-levels.html

18. none

19. https://www.physio-pedia.com/Lower_Limb_Prosthetic_Sockets_and_Suspension_Systems

20. none

21. http://www.abledamputees.org/k-levels

22. none

23. https://www.amputee-coalition.org/limb-loss-resource-center/resources-filtered/resources-by-topic/limb-loss-statistics/limb-loss-statistics/

24. none

25. none

26. https://www.physio-pedia.com/Lower_Limb_Prosthetic_Sockets_and_Suspension_Systems

27. https://www.physio-pedia.com/Lower_Limb_Prosthetic_Sockets_and_Suspension_Systems

28. https://www.physio-pedia.com/Lower_Limb_Prosthetic_Sockets_and_Suspension_Systems

29. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6472447/

30. none

31. http://www.orthobullets.com/foot-and-ankle/7046/diabetic-foot-ulcers

32. http://www.orthobullets.com/foot-and-ankle/7046/diabetic-foot-ulcers

33. http://www.orthobullets.com/foot-and-ankle/7046/diabetic-foot-ulcers