Article Source: CNN

Now, doctors who specialize in wound management are growing skin to help people like Tomas save their limbs and extremities. Pharmaceutical and biotech companies are extracting collagen -- a protein that makes up 75 percent of skin -- from donated skin and creating grafts, or patches, that can induce a patient's own skin to grow. The donated skin can come from a variety of sources: anything from a pig's pancreas to a baby's foreskin.

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