7292
GATA-1 and erythropoietin cooperate to promote erythroid cell survival by regulating bcl-xL expression .
 bcl-xL, erythropoietin, GATA-1
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:
 bcl-xL, erythropoietin, GATA-1