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In contrast , TSH - induced differentiation of progenitor cells , in particular the expression of the sodium iodide symporter , was significantly inhibited by 17beta - oestradiol . In conclusion , oestrogen stimulated growth and simultaneously inhibited differentiation of thyroid nodules derived stem / progenitor cells .
 sodium iodide, 17beta - oestradiol, oestrogen
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 sodium iodide, 17beta - oestradiol, oestrogen