Correlation coefficient (r) between matrices of genetic and geographic distances, and genetic diversity (F_st) among recruitment centers for each HLA locus under study.

Abbreviations used in the table, *: for 5 loci, we used a mean matrix of genetic distances and weighted average FST index with combined probability for HLA-A, -B, -C, -DRB1 and –DQB1 computed by Fisher's meta-analysis method. CTS: regional services for blood transfusion. #: CF and FR not tested because of small sample sizes. %:: BS and ZH not included at HLA-B because of HWE rejection. &: ZH not included at HLA-DRB1 because of HWE rejection. n: number of donors. N: number of groups tested. NA: The number of donors available at each of the 5 loci is used for the computations.