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High levels of matrix Gla protein are found at sites of artery calcification in rats treated with vitamin D plus Warfarin , and chemical analysis showed that the protein that accumulated was indeed not gamma - carboxylated .
 artery calcification, vitamin D, Warfarin, gamma - carboxylated
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 artery calcification, vitamin D, Warfarin, gamma - carboxylated