Hospitals that contract with PPOs: who are they?
D002140:California; D003284:Contract Services / Q000600:supply & distribution*; D003625:Data Collection; D005376:Financial Management / Q000600:supply & distribution*; D006761:Hospitals / Q000145:classification*; D007348:Insurance, Health / Q000458:organization & administration*; D011243:Preferred Provider Organizations / Q000458:organization & administration*