NPPB and heart failure: Whitman Whitman IR IR Vittinghoff Vittinghoff E E DeFilippi DeFilippi CR CR NT-pro BNP as a mediator of the racial difference in incident atrial fibrillation and heart failure NT-pro BNP as a mediator of the racial difference in incident atrial fibrillation and heart failure J Am Heart Assoc J Am Heart Assoc 2019 2019 8 8 e010868 e010868 10.1161/JAHA.118.010868 10.1161/JAHA.118.010868 supplied-pmid 30912456?