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The multivariate analysis showed that severe MR , MP ( EF < 45 % ) and high doses of MZ ( > 5mg ) were associated with events ( p < 0 . 001 ) .
 MR, MP, MZ
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 MR, MP, MZ