Pediatr Diabetes. 2023 Dec 11;2023:9973135. doi: 10.1155/2023/9973135. eCollection 2023. ABSTRACT OBJECTIVE: We studied the characteristics of children who developed islet autoantibodies by the age of 0.50 years and hypothesized that the appearance of extremely early islet autoimmunity differs between four birth cohorts within 1994-2019 according to the change in the…