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. 2017 Apr 25;23(3):666–673. doi: 10.1038/mp.2017.77

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/4.0/

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Ancestral composition for phase 1 of PGC-PTSD and principal components (PC) plot of individuals’ data. (a) PGC-PTSD (left) compared with the largest psychiatric meta-analyses (center) and estimated world ancestry (right). (b) Plot of first two principal components and assigned ancestry according to the protocol described in the text. Each dot is one individual. GWAS, genome-wide association study; PGC-PTSD, Psychiatric Genomics Consortium-Posttraumatic Stress Disorder group.