The determination of free 17,21-dihydroxy-20-ketosteroids in small amounts (4ml) of peripheral blood.
D000305:Adrenal Cortex Hormones / Q000097:blood*; D007664:Ketosteroids
D000305:Adrenal Cortex Hormones; D007664:Ketosteroids
ADRENAL CORTEX HORMONES/in blood