12591
Xenogeneic human serum significantly (P < 0.01) increased the number of adherent leukocytes as compared with porcine serum .
 adherent leukocytes
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:
 adherent leukocytes