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We have compared the frequency of a restriction fragment length polymorphism ( Bsm I ) associated with different alleles of the VDR gene in a group of 33 well characterized absorptive hypercalciuric patients and a group of 36 normal race- and age-matched control subjects .
 DNA: VDR gene; protein: VDR; DNA: restriction fragment length polymorphism; DNA: Bsm I
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 DNA: VDR gene; protein: VDR; DNA: restriction fragment length polymorphism; DNA: Bsm I