Pain supression: chronic effects.
D000328:Adult; D000368:Aged; D002908:Chronic Disease; D004558:Electric Stimulation / Q000379:methods; D004599:Electric Stimulation Therapy / Q000009:adverse effects / Q000379:methods; D004567:Electrodes, Implanted; D005069:Evaluation Studies as Topic; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D059408:Pain Management; D013127:Spinal Nerves; D013997:Time Factors