Single-base polymorphism of the ACE2 and TNF-alpha genes in patients with the cardiac and indeterminate forms of Chagas disease Bruna da Cruz Carvalho; Cilmery Suemi Kurokawa; Rodrigo Mattos dos Santos; Daniela Filadelfo Sanches; Simone Baldini Lucheis; Erika Alessandra Pellison Nunes da Costa;