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The aim of this study was to evaluate aflatoxin M1 ( AFM1 ) contamination in milk samples in Mashhad in Iran .
 Chemical: aflatoxin M1; Chemical: AFM1
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: aflatoxin M1; Chemical: AFM1