Presidential address: The giants among us.
D003695:Delivery of Health Care; D005139:Eyeglasses / Q000592:standards; D006077:Government Agencies; D006801:Humans; D007348:Insurance, Health; D007883:Legislation, Medical; D006278:Medicare; D009907:Optometry / Q000592:standards* / Q000639:trends; D014481:United States