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Taken together , our results indicate that arsenic indeed upregulates the AT1R expression , thus highlighting a role of arsenic - induced aberrant AT1R signaling in the pathogenesis of hypertension .
 Chemical: arsenic; Chemical: arsenic
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: arsenic, arsenic 
Answer:
 Chemical: arsenic; Chemical: arsenic