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The work reported here was instigated to identify additional VDR 3'-UTR polymorphisms that may have functional significance and to then test whether these genetic variants alter message stability .
 VDR, 3'-UTR
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 VDR, 3'-UTR