2003
Higher optical density of an antigen assay predicts thrombosis in patients with heparin - induced thrombocytopenia .
 thrombosis, heparin, thrombocytopenia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 thrombosis, heparin, thrombocytopenia