Fig. 1From: Mass spectrometry: an essential tool to be used in discrimination between causes of congenital adrenal hyperplasia, and its benefits versus radioimmunoassaya Chromatogram shows retention time of 21 deoxycortisol at 2.13 min, b shows the retention time of 11 deoxycortisol at 2.18 min, c shows the retention time of 17OHP 2.69 min, d shows the retention time of internal standard at 2.33 minBack to article page