2423
Blockade of T cell activation using a surface - linked single - chain antibody to CTLA - 4 ( CD152 ) .
 GENE: CTLA - 4; GENE: CD152
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: CTLA - 4; GENE: CD152