15897
The mRNA level for nestin ( Nes , biomarker for stem Leydig cells ) was significantly increased in the control testis on day 4 post - EDS , but not in the DEHP treated testes , suggesting that these nestin positive stem cells were differentiated into progenitor Leydig cells in the DEHP - treated testes .
 EDS, DEHP, DEHP
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 EDS, DEHP, DEHP