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An individual simulation model was developed to predict lifetime costs and quality - adjusted life years ( QALYs ) of 5 years of preventive alendronate therapy versus no preventive therapy .
 Chemical: alendronate
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: alendronate