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To test whether disordered memory T cell differentiation contributes to the typical Th1-dominated chronic inflammation in RA we investigated differentiation of resting CD4+ memory T cells in patients with early (6 wk to 12 mo) untreated RA and in age- and sex-matched healthy controls in vitro.
 cell type: memory T cell; cell type: resting CD4+ memory T cells
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: memory T cell, resting CD4+ memory T cells 
Answer:
 cell type: memory T cell; cell type: resting CD4+ memory T cells