3454
We present the case of a 28 - year - old man on chronic warfarin therapy who sustained a minor muscle tear and developed increasing pain and a flexure contracture of the right hip .
 warfarin, muscle tear, pain, contracture
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 warfarin, muscle tear, pain, contracture