Richard K Burt1, Piero Anversa2, Camillo Ricordi3. 1. Division of Immunotherapy, Northwestern University Feinberg School of Medicine, Chicago, IL, USA. 2. Department of Anesthesia and Medicine, Harvard Medical School, Brigham and Women's Hospital, Boston, MA, USA. 3. Cell Transplant Center and Diabetes Research Institute, University of Miami, Miami, FL, USA.