11730
With the recent interest of protease - activated receptors ( PAR ) 1 and PAR4 as possible targets for the treatment of thrombotic disorders , we compared the efficacy of protease - activated receptor ( PAR ) 1 and PAR4 in the generation of procoagulant phenotypes on platelet membranes .
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Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None