17595
We performed a cross - sectional study of 6 , 567 Korean men who participated in a health screening program , evaluating the association of serum 25 ( OH ) D ( 3 ) levels with the risk of NAFLD assessed by abdominal ultrasonogram .
 Chemical: 25 ( OH ) D ( 3 )
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 ( 3 )