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The method measures metabolites of iAs [ iAs ( III ) , iAs ( V ) , MMA , and DMA ] , but not organic As species ( e . g . , arsenobetaine , arsenocholine ) originating from the diet , because those arsenicals do not form volatile arsines ( hydride generation ) like iAs and its metabolites do .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
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