6804
BACKGROUND: Growing evidence indicates that the immune system and the hypothalamic-pituitary-adrenal system are linked by several mechanisms, for example intracellular glucocorticoid receptors ( hGR ).
 glucocorticoid receptors, hGR
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:
 glucocorticoid receptors, hGR