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Laser burn dosimetry. Upper panel: Total number of laser burns applied according to PDR. y axis: Number of laser burns. x axis: Grade of PDR; mild—1, moderate—2, and severe—3. Lower panel: Total number of laser burns required to produce complete regression of PDR disease. y axis: Number of laser burns. x axis: Grade of PDR; mild—1, moderate—2, and severe—3.
