Gravity lumbar reduction.
D001416:Back Pain / Q000628:therapy*; D001513:Beds; D005260:Female; D006112:Gravitation; D006801:Humans; D007405:Intervertebral Disc Displacement / Q000628:therapy*; D008159:Lumbar Vertebrae; D008297:Male; D014143:Traction / Q000295:instrumentation / Q000379:methods*