HMOs found to use few standards in contracts for tertiary care.
D003284:Contract Services / Q000458:organization & administration*; D003422:Critical Care / Q000458:organization & administration / Q000592:standards; D006279:Health Maintenance Organizations / Q000458:organization & administration*; D006302:Health Services Research; D006801:Humans; D007231:Infant, Newborn; D017283:Neonatal Nursing / Q000458:organization & administration / Q000592:standards; D012017:Referral and Consultation / Q000458:organization & administration; D014481:United States