Spencer C Knight; Shannon R McCurdy; Brooke Rhead; Marie V Coignet; Danny S Park; Genevieve H L Roberts; Nathan D Berkowitz; Miao Zhang; David Turissini; Karen Delgado; Milos Pavlovic; AncestryDNA Science Team; Asher K Haug Baltzell; Harendra Guturu; Kristin A Rand; Ahna R Girshick; Eurie L Hong; Catherine A Ball.