title: A reverse double-isotope enzymatic histamine assay: advantages over single-isotope methods.
mesh_terms: D002250:Carbon Radioisotopes; D003061:Codeine / Q000097:blood; D006632:Histamine / Q000097:blood*; D006636:Histamine Release; D006801:Humans; D007553:Isotope Labeling / Q000379:methods; D007962:Leukocytes / Q000378:metabolism; D014316:Tritium
chemical_list: D002250:Carbon Radioisotopes; D014316:Tritium; D006632:Histamine; D003061:Codeine