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Nevertheless , there have been no studies on the temporal relationship between the appearance of MPO - ANCA and vasculitis during PTU therapy , or on the incidence of MPO - ANCA in untreated Graves ' disease patients .
 Disease: vasculitis; Chemical: PTU; Disease: Graves ' disease
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Disease: vasculitis; Chemical: PTU; Disease: Graves ' disease