Power to identify the two susceptibility sites for different rates of missing data. Missing data and missing phases are reconstructed using a multiple imputation method (in red) or the most likely haplotypes obtained with ZAPLO (in black). The percentage of replicates in which the two sites with the highest Vi values are DR and locus C are reported in the two situations in which there are other sites with V
> 0 (open bars) or there is no other site with V
> 0 (colored bars).