Various types of artificial skin are available or in the works. One used for treating leg ulcers is living tissue cultured in the laboratory using human cells grown from the discarded foreskins of circumcised newborns. (1) Another is a non-living skin substitute used to temporarily cover severe burns. (4) Yet another relies on donated human skin from tissue banks that is then stripped of cells so a patient's own cells can colonize it. (5)

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