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The probability of penetration and aspiration increases with bolus size for preterm infants at day 7 (A) and 17 (B) as well as for term infants at day 7 (C) and 17 (D). In contrast, lesion does not have an effect on swallow safety in term infants at either age, although preterm infants with lesion are less likely to aspirate at day 7 (A), whereas they are more likely to have penetration at day 17 (C).Lesion effect indicated by ‘+’, bolus size effect indicated by ′^′.
