the random faecal alpha-1-antitrypsin ( at ) excretion ( mg/g dry weight of stool ) was measured in 30 infants and children ( mean age 10.8 +/- 8 mo . ) with protracted diarrhoea ( duration greater than or equal to 21 days ) and failure to thrive and 27 normally nourished children ( mean age 13 +/- 4.5 mo . ) without any gastrointestinal symptoms in the preceding 12 weeks .
C0021270
infants
C0008059
children