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Contrast passage rate measured by serial of x-ray images after intake of contrast solution in 4 d-old immature piglets. (A) Stomach emptying time (StEmpty) in preterm and near-term piglets. (B) Small intestinal emptying time (SIEmpty) in preterm and near-term piglets. (C) Time for the contrast to reach the caecum (ToCaecum) in piglets fed formula or bovine colostrum.
