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Biliary atresia (BA) is a neonatal obstructive cholangiopathy requiring rapid intervention to prevent end-stage liver failure and death. Low bile acid levels in stool, detectable with high-performance liquid chromatography–mass spectroscopy, may reflect extrahepatic biliary obstruction in cholestasis.Stool bile acid content can differentiate BA from non-BA forms of cholestasis.Stool samples from four...
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