The Phylogeny of the Four Pan-American MtDNA Haplogroups: Implications for Evolutionary and Disease Studies. - Achilli, Alessandro; Perego, Ugo A.; Bravi, Claudio M.; Coble, Michael D.; Qing-Peng Kong; Woodward, Scott R.; Salas, Antonio; Torroni, Antonio; Bandelt, Hans-Jürgen (PLoS ONE, 2008)