5586
Thus, our data indicate that Stat3 and Stat5 may be involved in signal transduction after ligand binding to c-Mpl and that this event may have a role in megakaryopoiesis/ thrombopoiesis or possibly a mature platelet function such as aggregation .
 c-Mpl, Stat5, Stat3
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:
 c-Mpl, Stat5, Stat3