Low back pain.
D000328:Adult; D001416:Back Pain / Q000209:etiology / Q000628:therapy; D006801:Humans; D007405:Intervertebral Disc Displacement / Q000175:diagnosis; D008297:Male; D008875:Middle Aged; D013166:Spondylitis / Q000175:diagnosis; D013168:Spondylolisthesis / Q000175:diagnosis