Diagnostic use of radioisotopes.
D041981:Gastrointestinal Tract / Q000175:diagnosis*; D006801:Humans; D007455:Iodine; D007457:Iodine Radioisotopes; D011868:Radioisotopes; D013961:Thyroid Gland / Q000175:diagnosis*
D007457:Iodine Radioisotopes; D011868:Radioisotopes; D007455:Iodine
GASTROINTESTINAL SYSTEM/diagnosis; IODINE/radioactive; THYROID GLAND/diagnosis