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We tested associations of circulating vitamin D metabolite concentrations with subclinical atherosclerosis among 1 , 193 participants with type 1 diabetes in the DCCT / EDIC study . RESEARCH DESIGN AND METHODSWe measured plasma concentrations of 25 - hydroxyvitamin D [ 25 ( OH ) D ] , 1 , 25 - dihydroxyvitamin D , and 24 , 25 - dihydroxyvitamin D by mass spectrometry at the end of the DCCT .
 Chemical: vitamin D; Chemical: 25 - hydroxyvitamin D; Chemical: 25 ( OH ) D; Chemical: 1 , 25 - dihydroxyvitamin D; Chemical: 24 , 25 - dihydroxyvitamin 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; Chemical: 25 - hydroxyvitamin D; Chemical: 25 ( OH ) D; Chemical: 1 , 25 - dihydroxyvitamin D; Chemical: 24 , 25 - dihydroxyvitamin D