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The association between exposure to antibiotics in prenatal life and childhood-onset type 1 diabetes in 685,002 children (with complete data). Only families with at least one type 1 diabetes event and at least one individual free of type 1 diabetes at the age of event in the individual with type 1 diabetes are included in the sibling analysis (n = 923). ▪, total analysis; ●, sibling analysis.
