NEUROG3 and type 1 diabetes mellitus: The 12 NEUROG3+ cells originated from multiple donors with various conditions (six control donors, one donor with type 1 diabetes, and three donors with type 2 diabetes), and of different ages (18 days to 57 years old), confirming that NEUROG3+ cells exist in postnatal human pancreata regardless of health status and age (Table S2).