2681
The presence of circulating platelet aggregates and elevated levels of fibrinopeptide A ( a cleavage product of fibrin ) suggests that platelet activation and fibrin deposition may play a role in the pathogenesis of this disorder .
 fibrinopeptide A, fibrin, fibrin
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 fibrinopeptide A, fibrin, fibrin