18786
Protein expression levels of cell cycle regulating proteins Cdk4 , Cyclin D1 , p16 and p27 were markedly altered by SIM .
 Chemical: SIM
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: SIM