Principal component analysis of clustering between Chaoshanese and other Han Chinese populations.

<p>Nasopharyngeal carcinoma (NPC) patients and normal control (NC) subjects from the Chaoshan region in this study, together with reported Chaoshan populations [42.43] and other Han Chinese populations across China from published sources were included for analysis based on their mtDNA haplogroup frequencies. △ denotes southern Han populations, ◊ denotes northern Han populations, *denotes the Chaoshan populations. Each population is represented by the population ID as listed in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0087795#pone.0087795.s001" target="_blank">Table S1</a>.