You can't determine kidney retention by measuring urinary excretion.
D006801:Humans; D007668:Kidney / Q000187:drug effects* / Q000528:radiation effects*; D009941:Organomercury Compounds / Q000008:administration & dosage; D011830:Radiation Effects; D011874:Radiometry; D014556:Urine / Q000032:analysis*
D009941:Organomercury Compounds