13188
TCRzeta and p56(lck) were detected in the peripheral blood T cells in 27 of 29 patients , and overall, reduced levels were noted visually in 12 of 29 (41%) and 13 of 29 (45%) individuals, respectively.
 p56(lck), peripheral blood T cells, TCRzeta
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 p56(lck), peripheral blood T cells, TCRzeta