title: Pilot study on the effects of transcutaneous electrical nerve stimulation on the level of plasma beta-endorphin.
mesh_terms: D000328:Adult; D001416:Back Pain / Q000097:blood / Q000628:therapy*; D004599:Electric Stimulation Therapy; D004723:Endorphins / Q000097:blood*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D004561:Transcutaneous Electric Nerve Stimulation; D001615:beta-Endorphin
chemical_list: D004723:Endorphins; D001615:beta-Endorphin