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Search terms for Osteoarthritis #1. (osteoarthritis* OR osteoarthro* OR gonarthriti* OR gonarthro* OR coxarthriti* OR coxarthro* OR arthros* OR arthrot* OR ((knee* OR hip* OR joint*) near/3 (pain* OR ach* OR discomfort*)) OR ((knee* OR hip* OR joint*) near/3 stiff*)) in Clinical Trials #2. MeSH descriptor Osteoarthritis explode all trees Search terms for TENS #3. MeSH descriptor Electric Stimulation Therapy explode all trees #4. electric* near/ (nerve or therapy) in Clinical Trials #5. electric* near/ (stimulation or muscle) in Clinical Trials #6. electrostimulation in Clinical Trials #7. electroanalgesia in Clinical Trials #8. tens or altens in Clinical Trials #9. electroacupuncture in Clinical Trials #10. neuromusc* electric* in Clinical Trials #11. high volt in Clinical Trials #12. pulsed in Clinical Trials #13. (electric* near/25 current) in Clinical Trials #14. (electromagnetic or electrotherap*) in Clinical Trials #15. iontophoresis in Clinical Trials #16. transcutaneous nerve stimulation in Clinical Trials Combining terms #17. (#3 OR #4 OR #5 OR #6 OR #7 OR #8 OR #9 OR #10 OR #11 OR #12 OR #13 OR #14 OR #15 OR #16) #18. (#1 OR #2) #19. (#17 AND #18) in Clinical Trials

1. Electro in title or abstract 2. Method: clinical trial 3. Body part: thigh or hip 4. Body part lower leg or knee Combination 1. and 2. and 3. Combination 1. and 2. and 4. 1. TENS in title or abstract 2. Method: clinical trial 3. Body part: thigh or hip 4. Body part lower leg or knee Combination 1. and 2. and 3. Combination 1. and 2. and 4. Combine all