Physician influence on Blue Shield plans: a reexamination of the findings.
D054598:Blue Cross Blue Shield Insurance Plans / Q000191:economics / Q000458:organization & administration*; D005251:Fees, Medical; D006075:Governing Board / Q000458:organization & administration*; D007357:Insurance, Physician Services / Q000458:organization & administration*; D010820:Physicians; D012044:Regression Analysis; D013514:Surgical Procedures, Operative / Q000191:economics; D014481:United States