title: Letter: Thyopac-5 test.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007457:Iodine Radioisotopes; D008297:Male; D008722:Methods; D008875:Middle Aged; D013959:Thyroid Diseases / Q000175:diagnosis; D013960:Thyroid Function Tests; D013974:Thyroxine / Q000097:blood*; D013975:Thyroxine-Binding Proteins / Q000032:analysis*
chemical_list: D007457:Iodine Radioisotopes; D013975:Thyroxine-Binding Proteins; D013974:Thyroxine