Correlation coefficient (r) between matrices of genetic and geographic distances, and genetic diversity (Fst) 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.