1975
When respondents were asked if the presence of an informed consent would influence their decision to participate in biobanking , more individuals ( 19 . 8 % ) considered having an informed consent mechanism as a positive factor than those who considered it to have negative connotations ( 13 . 1 % ) .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 None