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. 2020 Oct 16;10(10):e038846. doi: 10.1136/bmjopen-2020-038846

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© Author(s) (or their employer(s)) 2020. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

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Eligible cohort and numbers included for analyses. AEDC, Australian Early Development Census; WARDA, Western Australian register of developmental anomalies.