“…The Amhara, Tigray, Oromo, Afar, and Anuak samples were collected at altitudes of 1,829 m, 1,695 m, 1,758 m, 400 m, and 500 m, respectively. Though the samples were not collected at extremely high altitudess, the Amhara and Oromo populations have been residing in regions of Ethiopia higher than 2,500 m for many generations (Lewis 1966; Hassen 1990; Alkorta-Aranburu et al 2012). The Tigray individuals were chosen, so that they had both parents and all grandparents living at greater than 2,000 m. Using these five populations, we performed five selection scans without correcting for admixture and another five selection scans after correcting for admixture.…”