The number of flanking SNPs is likely to account for the loss of taggability, because the ascertainment bias of both SNP discovery and array design exit between Asian and European populations, and we found that the average number (14.7) of flanking SNPs for high ‘taggability’ CNPs ( r 2 > = 0.8) was marginally significant than that (11.7) of low taggability CNPs ( r 2 <0.8).
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