20872
Absence of correlation between oxysterol accumulation in lipid raft microdomains , calcium increase , and apoptosis induction on 158N murine oligodendrocytes .
 oxysterol, calcium
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 oxysterol, calcium