title: How effective is TENS for chronic pain?
mesh_terms: D000328:Adult; D000368:Aged; D000553:Ambulatory Care; D002908:Chronic Disease; D004599:Electric Stimulation Therapy / Q000379:methods*; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D059408:Pain Management; D010353:Patient Education as Topic