To ease shortage of organs, grow them in a lab?

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Growing Organs
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Growing Organs
A computer displays an image of the "scaffolding" for a human ear being created by a nearby printer in a laboratory at Wake Forest University in Winston-Salem, N.C. on Wednesday, May 8, 2013. The university is experimenting with various ways to create replacement organs for human implantation, from altering animal parts to building them from scratch with a patient's own cells. (AP Photo/Allen Breed)