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In the inpatient setting , the frequency of QT interval prolongation with methadone treatment , its dose dependence , and the importance of cofactors such as drug - drug interactions remain unknown .
 Disease: QT interval prolongation; Chemical: methadone
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: QT interval prolongation; Chemical: methadone