“…The same web site, which includes information of recent contributions to the mitochondrial DNA phylogeny [21][22][23], was consulted to refine the classification of some haplogroups, notably those belonging to lineages A2, A2a, B2, B4b, C1a, C1b and D1. Finally, we compared the haplogroup frequencies of European-specific clades via an exact chi-square test by the Monte Carlo method using previously published data from Portugal [24], Germany [25], and Italy [26].…”