4486
Recent studies have identified homologues of STAT5 , STAT5A , and STAT5B , as well as lower molecular weight variants of STAT5 .
 STAT5B, STAT5, STAT5, STAT5A
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:
 STAT5B, STAT5, STAT5, STAT5A