Physicians' perceptions of the impact of Medicare.
D000328:Adult; D000368:Aged; D001291:Attitude of Health Personnel; D006801:Humans; D006278:Medicare; D008875:Middle Aged; D010465:Perception; D010548:Personal Health Services / Q000706:statistics & numerical data; D010817:Physician-Patient Relations; D010820:Physicians; D014481:United States