San Diego's Viacyte is testing its artificial, lab-grown pancreas in three humans. The artificially derived pancreas cells are created using human stem cells and inserted into the subject through an incision in the back. In the hopes of treating diabetes, Medtronic ($MDT) and others are attempting to create a functional artificial pancreas using a mechanical approach. But Viacyte hopes the use of stem cells will enable it to create a truly artificial pancreas. Article