7962
Leukocyte populations , hormone receptors and apoptosis in eutopic and ectopic first trimester human pregnancies .
 ( cell type: Leukocyte populations, None) , ( protein: hormone receptors, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( cell type: Leukocyte populations, None) , ( protein: hormone receptors, None) 