438
Results showed that the 845 G - - > A mutation was present in these populations ( allele frequency 0 . 32 % ) , and , furthermore , it was always seen in conjunction with HLA haplotypes common in Caucasians , suggesting that 845 G - - > A may have been introduced into these populations by Caucasian admixture .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease 
Text: {0} 
Answer:
 None