Difficult diagnoses in back pain.
D001416:Back Pain / Q000209:etiology*; D005260:Female; D006801:Humans; D007405:Intervertebral Disc Displacement / Q000175:diagnosis; D008875:Middle Aged; D013124:Spinal Injuries / Q000175:diagnosis; D013130:Spinal Stenosis / Q000175:diagnosis; D013167:Spondylitis, Ankylosing / Q000175:diagnosis