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We hypothesized that lower concentrations of each vitamin D metabolite would be associated with increased risk of CAC and greater carotid IMT . RESULTSAt the time metabolites were measured , mean age was 32 . 4 years and mean duration of diabetes was 7 . 5 years .
 Chemical: vitamin D
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: vitamin D