Conditions: Neuropathic Pain; Spinal Stenosis
Intervention: Drug: transdermal fentanyl matrix, gabapentin
Sponsors : Seoul National University Hospital; Seoul National University Bundang Hospital; Masan Samsung Hospital, South Korea; Asan Medical Center; Inje University; Chonnam National University Hospital; Chung-Ang University
Enrolling by invitation - verified July 2011
