The river of time: coping with change.
Boyd-Monk
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D000163:Acquired Immunodeficiency Syndrome / Q000517:prevention & control / Q000635:transmission; D016039:Corneal Transplantation; D006801:Humans; D009885:Ophthalmology / Q000639:trends*; D012164:Retinal Diseases / Q000601:surgery; D014481:United States; D014486:United States Food and Drug Administration