title: Response to letter from Dr North.
authors: Judith A
authors: JA
authors: Turner
authors: William
authors: W
authors: Hollingworth
authors: Bryan
authors: B
authors: Comstock
authors: Richard A
authors: RA
authors: Deyo
mesh_terms: D004599:Electric Stimulation Therapy / Q000191:economics*; D055111:Failed Back Surgery Syndrome / Q000191:economics*; D005260:Female; D006801:Humans; D008297:Male; D013116:Spinal Cord / Q000502:physiology*; D014942:Workers' Compensation / Q000191:economics*