title: Erroneous plasma norepinephrine levels with radioimmunoassay.
mesh_terms: D000328:Adult; D003000:Clonidine; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009638:Norepinephrine / Q000097:blood*; D011863:Radioimmunoassay
chemical_list: D003000:Clonidine; D009638:Norepinephrine