29500
We compared the cost - effectiveness of FXaIs with low - molecular - weight heparin ( LMWH ) in patients undergoing total hip replacement ( THR ) or total knee replacement ( TKR ) surgery .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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