Ilkhanoff L, Arking DE, Lemaitre RN, Alonso A, Chen LY, Durda P, Hesselson SE, Kerr KF, Magnani JW, Marcus GM, et al. A common SCN5A variant is associated with PR interval and atrial fibrillation among African Americans. J Cardiovasc Electrophysiol. 2014  ;25(11):1150-7.