8699
WEV + NP decreased the surface expression of the CKRs CXCR3 , CXCR4 , CXCR5 and CXCR6 to a greater extent than WEV alone and subsequently reduced migration and the invasion response of the cells to the cognate ligands of the CKRs ( CXCL10 , CXCL12 , CXCL13 and CXCL16 , respectively ) .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None