2286
This study was conducted to elucidate the relationship between active vitamin D directly stimulated by ultraviolet B ( UVB ) exposure and FGF - 23 level in human .
 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