2.2. Inclusion and exclusion criteria

The inclusion criteria were patients with SCI with neuropathic pain aged from 18 to 65 years, levels of SCI from A to D (American Spinal Injury Association [ASIA] impairment scale), more than 1 year after SCI, daily neuropathic pain lasting more than 3 months, and visual analog scale (VAS) score ≥40 (VAS, 0–100 mm). The subjects were excluded if they had a contraindication, hypersensitivity, history of BTA, any other reasons that led to neuropathic pain except SCI, coagulation disorders, pregnancy, or declined to participate. However, the other concomitant analgesic medication with stable dose was allowed in this study.