Declining antibody levels to Trypanosoma cruzi correlate with polymerase chain reaction positivity and electrocardiographic changes in a retrospective cohort of untreated Brazilian blood donors - Buss, Lewis F; Silva, Lea Campos de Oliveira-da; Moreira, Carlos H. V; Manuli, Erika R; Sales, Flavia C; Morales, Ingra; Germanio, Clara Di; Almeida-Neto, Cesar de; Bakkour, Sonia; Sabino, Ester Cerdeira (Plos neglected tropical diseases, 2020)