Most GWAS analyses have been conducted in European ancestry populations [6, 9–11, 8, 12–14, 18, 19, 21, 22, 29, 32], although one focused on Hispanics [25], one focused on Japanese [17], eight included or focused exclusively on African Americans [15, 16, 20, 23, 24, 26, 28, 27], and two others included multiple ancestries [30, 31]. Two GWAS analyses examined copy number variants [17, 23], while all others focused on SNP and insertion/deletion (indel) variants.
