583
The decreased T cell reactivity to thyroid antigens after thyroidectomy could be the result of removal of a major part of the thyroid gland or redistribution of suppressor-inducer T cells .
 T cells, thyroid antigens
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 T cells, thyroid antigens