3962
The primary tumors in Group C had a normal profile of p16 , p15 and CDK4 at presentation.
 p16, p15, CDK4
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 p16, p15, CDK4