8792
We examined the allele-specific expression of WT1 in cultured human fibroblasts from 15 individuals .
 WT1, human fibroblasts
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:
 WT1, human fibroblasts