60658
In iodine-131 ( radioiodine ) radioisotope therapy , which was first pioneered by Dr. Saul Hertz , radioactive iodine-131 is given orally ( either by pill or liquid ) on a one-time basis , to severely restrict , or altogether destroy the function of a hyperactive thyroid gland .
 Saul Hertz
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
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Answer:
 Saul Hertz