Orthopedic prices don't match case volume, survey shows.
D019644:Arthroplasty, Replacement, Hip / Q000191:economics / Q000706:statistics & numerical data; D019645:Arthroplasty, Replacement, Knee / Q000706:statistics & numerical data; D005249:Fees and Charges / Q000639:trends*; D019538:Health Care Surveys; D006801:Humans; D009985:Orthopedics / Q000191:economics*; D014481:United States