HLA-A and hydrops fetalis: We calculated 5-locus (HLA-A, -B, -C, -DRB1 and -DQB1) and 6-locus (HLA-A, -B, -C, -DRB1, -DQB1 and -DPB1) haplotype frequencies for the 8 Indian population samples and the two reference samples (Table 3; a direct frequency comparison of the union of the respective Top 10 HF sets of the 8 Indian subsamples is shown in Figure 3; complete 5- and 6-locus HF are given in Supplementary Informations S13 and S14).