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Costimulation with anti- CD28 MoAb greatly enhanced the proliferative response of neonatal T cells to levels equivalent to those of adult T cells , whereas adult T cells showed only slight increases.
 cell type: T cells; cell type: adult T cells; protein: CD28; cell type: T cells; protein: anti- CD28 MoAb; cell type: neonatal T cells; cell type: T cells; cell type: adult T cells
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 cell type: T cells; cell type: adult T cells; protein: CD28; cell type: T cells; protein: anti- CD28 MoAb; cell type: neonatal T cells; cell type: T cells; cell type: adult T cells