The IIDP would also like to thank the retiring IIDP islet isolation centers at the University of Pennsylvania and the University of Miami, directed by Dr. Ali Naji and Dr. Camillo Ricordi, respectively. Drs. Naji and Ricordi have been pioneers in islet isolation and transplantation research and original participants in the IIDP and its precursor program, the Islet Cell Resource (ICR) Center Consortium, since the founding of the program in 2002. Each lab has shipped tens of millions of human islets to islet researchers worldwide, and their roles as advisors, collaborators, and friends have shaped the ICR and IIDP in immeasurable ways. The IIDP would like to express our sincere gratitude to Dr. Naji, Dr. Ricordi, and the staff at both the University of Pennsylvania’s and the University of Miami’s human islet centers for their hard work, dedication, and achievements for the past 20 years.