Evaluation of low back pain by differential spinal block.
D000775:Anesthesia, Spinal; D001416:Back Pain / Q000175:diagnosis*; D003937:Diagnosis, Differential; D004185:Disability Evaluation; D006801:Humans; D008012:Lidocaine; D011602:Psychophysiologic Disorders / Q000175:diagnosis
D008012:Lidocaine