laboratory diagnostic - hormones - others - 11-Deoxycorticosterone, compound B, serum 2ml, refrigerated. CIRCADIAN RHYTHM: This biological parameter has a circadian rhythm (maximum concentration in morning), with a sufficiently significant amplitude to have a significant influence on the clinical interpretation. Chromatography - Extraction - Radioimmunoassay, ssso, todylaboratories®, bmn, code L16LD1833