Christensen MA, Nguyen KT, Stein PK, Fohtung RB, Soliman EZ, Dewland TA, Vittinghoff E, Psaty BM, Heckbert SR, Marcus GM. Atrial ectopy as a mediator of the association between race and atrial fibrillation. Heart Rhythm. 2017 12; 14(12):1856-1861.