14623
OBJECTIVE : To study the role of the programmed death - 1 ( PD - 1 ) / programmed death - 1 ligand 1 ( PD - L1 ) coinhibitory pathway in regulating CD4 ( + ) CD28 ( - ) T cells , and to explore the association of soluble PD - L1 ( sPD - L1 ) in the development of T2DM with atherosclerotic macrovascular diseases .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None