241497
Research Arias-Stella reaction The Arias-Stella reaction , as discovered by Javier , found that a reaction previously thought of as cancer that occurred in the endometrium was actually normal reactions of hormones from placental tissue .
 Javier
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Javier