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The association of serum 25 - hydroxyvitamin D and vertebral fractures in patients with type 2 diabetes .
 Chemical: 25 - hydroxyvitamin 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: 25 - hydroxyvitamin D