On the periphery: vision care in the 90s.
McCarthy
R
R
D006264:Health Benefit Plans, Employee / Q000639:trends*; D006801:Humans; D007221:Industry / Q000639:trends; D007342:Insurance Benefits; D009907:Optometry / Q000191:economics; D014481:United States; D014786:Vision Disorders / Q000191:economics*