1. Department of Chemical Engineering, University of California Santa Barbara, Santa Barbara, California;
2. Sansum Diabetes Research Institute, Santa Barbara, California;
3. Department of Aeronautics and Astronautics, Stanford University, Palo Alto, California;
4. Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, New York;
5. Barbara Davis Center for Childhood Diabetes, University of Colorado Health Sciences Center, Aurora, Colorado;
6. Department of Pediatrics, Division of Pediatric Endocrinology, Stanford Medical Center, Palo Alto, California.