30664
In thyroid stem / progenitor cells derived from nodular goitres the ability of 17beta - oestradiol to induce thyrosphere formation , the expression of oestrogen receptors and the effect of 17beta - oestradiol on growth , expression of marker of stem cells and thyroid differentiation ( TSH receptor , thyroperoxidase , thyroglobulin , sodium iodide symporter expression ) were analysed .
 17beta - oestradiol, oestrogen, 17beta - oestradiol, sodium iodide
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 17beta - oestradiol, oestrogen, 17beta - oestradiol, sodium iodide