When the pain won't go away.
Smith
Scott D
SD
D001416:Back Pain / Q000191:economics / Q000628:therapy*; D002908:Chronic Disease; D004185:Disability Evaluation; D006801:Humans; D008910:Minnesota; D010043:Outcome and Process Assessment, Health Care; D017410:Practice Guidelines as Topic; D019564:Unnecessary Procedures / Q000191:economics*