1. Type 1 Diabetes Center, La Jolla Institute for Allergy and Immunology, La Jolla, California (TRC, JSS, NA, JZG, FA, SS, MGVH)
2. Department of Immunohematology & Blood Transfusion, Leiden University Medical Center, Leiden, Netherlands (JSS)
3. Novo Nordisk Diabetes Research & Development Center, Seattle, Washington (MGVH)