1311
However , it is encouraging that most participants were willing to receive PrEP at a healthcare facility , which can facilitate synergies between PrEP and other existing prevention services .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
 Entities:  
Answer:
 None