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Tolerance of kidneys in cynomolgus monkeys: A) Gross appearance of transplanted kidney at biopsy (normal); B) Microscopic appearance of same kidney, (normal histology); C) Frozen donor skin grafted onto thorax of recipient approximately one year after renal transplant is accepted (left), while third party skin, either fresh (top right) or frozen (bottom right) is rejected by day 15 after skin grafting.
