NeoMass CAH Multilevel DBS Controls are used for quality assurance in determining the accuracy of the analytes androstenedione, cortisol, 11-deoxycortisol, 21-deoxycortisol, 17-hydroxyprogesterone and 21-hydroxyprogesterone in Dried Blood Spots (DBS). These DBS controls are prepared by using human blood and are available as a control set with 3 levels. The controls are handled and used in the same way as newborn DBS samples. It is recommended to use controls in duplicates at each level per run.