Animals 2 Antibodies, Protozoan 2 Cells, Cultured 2 Chagas Disease 2 Chagas disease 2 Chronic Chagas' heart disease 2 Cross Reactions 2 Enzyme-Linked Immunosorbent Assay 2 Epitope Mapping 2 Epitopes 2 Humans 2 M2-cholinergic receptor 2 Myocytes, Cardiac 2 Rats 2 Rats, Sprague-Dawley 2 Receptors, Adrenergic, beta 2 Receptors, Cholinergic 2 Ribosomal P proteins 2 Ribosomal Proteins 2 Trypanosoma cruzi 2 animal cell 2 animal tissue 2 antibody affinity 2 antibody detection 2 antibody specificity 2 antigen recognition 2 article 2 beta 1 adrenergic receptor 2 chronic disease 2 controlled study 2