title: Letter: Digoxin immunoassay with use of [3H]digoxin vs. [125I]tyrosine-methyl-ester of digoxin.
mesh_terms: D004077:Digoxin / Q000031:analogs & derivatives / Q000097:blood*; D005069:Evaluation Studies as Topic; D006801:Humans; D007457:Iodine Radioisotopes; D011863:Radioimmunoassay / Q000379:methods; D014316:Tritium
chemical_list: D007457:Iodine Radioisotopes; D014316:Tritium; D004077:Digoxin