23585
We reviewed 1 , 286 abstracts and finally included 29 prospective cohort studies with 1 , 980 , 761 participants and 67 , 075 pre - eclampsia events .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 None