11482
This report indicates that the emergence of CTLs against immunorecessive epitopes following multiple administrations of Ad vectors lacking immunodominant antigens is dependent on haplotype and could present an obstacle to gene therapy in an MHC -diverse human population .
 protein: MHC; protein: immunorecessive epitopes; cell type: CTLs
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities: MHC, immunorecessive epitopes, CTLs 
Answer:
 protein: MHC; protein: immunorecessive epitopes; cell type: CTLs