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In conclusion , serum 25 ( OH ) D levels below 20 ng / mL were associated with an increased vertebral fracture risk in men with type 2 diabetes .
 Chemical: 25 ( OH ) 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 ( OH ) D