Clinica, radiographic, and manometric evolution of esophageal involvement by Chagas' disease - Meneghelli, Ulisses Garzella; Peria, Fernanda; Darezzo, Fabiana M. R.; Almeida, Fernando H.; Rodrigues, Carla M.; Aprile, Lilian Rose Otoboni; Dantas, Roberto Oliveira (Dysphagia, 2005)