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In vitro treatment with a combination of 25 ( OH ) D and PTH rejuvenated osteoblastogenesis with hMSCs from elders ; this was attributable to increases in CYP27B1 / 1 alpha - hydroxylase and in receptor for each hormone by the reciprocal factor .
 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