Abstract:Introduction: Liquid chromatography followed by mass spectrometry (LC-MS/MS) is considered the gold standard method to measure steroids. Newborn screening for congenital adrenal hyperplasia (CAH) involves measurement of 17α-hydroxyprogesterone (17-OHP) in blood dried spots by immunoassay. Because this testing has high false-positive rates, serum samples to measure 17-OHP, androstenedione, 21-desoxicortisol and cortisol simultaneously by liquid chromatography-tandem mass spectrometry (LC-MS/MS) are used for con… Show more
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