Tsai HJ, Kho JY, Shaikh N, Choudhry S, Naqvi M, Navarro D, Matallana H, Castro R, Lilly CM, Watson HG, Meade K, Lenoir M, Thyne S, Ziv E, Burchard EG. Admixture-matched case-control study: a practical approach for genetic association studies in admixed populations. Hum Genet. 2006 Jan; 118(5):626-39.