1888
In addition to direct effects on mammary epithelial cells , including decreased proliferation and induction of apoptosis , CLA may exert its effects indirectly by inhibiting the differentiation of mammary stromal cells to an endothelial cell type .
 mammary epithelial cells, mammary stromal cells, endothelial cell type
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 mammary epithelial cells, mammary stromal cells, endothelial cell type