Percutaneous electrical nerve stimulation: a novel analgesic therapy for diabetic neuropathic pain. - Hamza,M.A.; White,P.F.; Craig,W.F.; Ghoname,E.S.; Ahmed,H.E.; Proctor,T.J.; Noe,C.E.; Vakharia,A.S.; Gajraj,N. (Diabetes Care, 2000)