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Participant flow diagram. Participant flow diagram illustrating the number of mother–infant dyads assessed for eligibility 24–36 h after delivery, enrolled in newborn screening, screened, and enrolled in postnatal study with distribution according to maternal vitamin D status (insufficient vs. sufficient) and GWG categories (inadequate, adequate, and excessive). Abbreviations: 25(OH)D: 25-hydroxyvitamin D, and GWG: gestational weight gain.
