in plasma from normal humans ( n = 9 , 35 samples ) and from patients with diabetes mellitus ( n = 12 , 24 samples ) single-isotope derivative ( radioenzymatic ) plasma norepinephrine and epinephrine concentrations calculated from external standard curves constructed in a normal plasma pool were identical to those calculated from internal standards added to an aliquot of each plasma sample .
C0028351
norepinephrine
C0014563
epinephrine