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Pancreatic elastase (E1) levels in the two groups of newborn infants. Samples 1, 2, and 3 were collected on median day 2, median day 5, and median day 9 respectively. Reference concentrations for pancreatic E1 in adult stools are: normal, ≥ 200 µg/g; moderate to light exocrine pancreatic insufficiency, 100 to < 200 µg/g; severe pancreatic insufficiency, ≤ 100 µg/g.
