Pain centers: an alternative for management of chronic pain.
D000554:Ambulatory Care Facilities / Q000458:organization & administration*; D003625:Data Collection; D005102:Health Expenditures; D006760:Hospitalization; D006801:Humans; D007349:Insurance, Health, Reimbursement; D008962:Models, Theoretical; D010148:Intractable Pain / Q000191:economics* / Q000523:psychology / Q000628:therapy; D014481:United States