Chagas' disease: iga, igm and igg antibodies to t.Cruzi amastigote trypomastigote and epimastigote antigens in acute and in different chronic forms of the disease - Primavera, Katia Schelini da Costa; Umezawa, Eufrosina Setsu; Peres, Benedito Anselmo; Camargo, Mario Endsfeldz; Hoshino-Shimizu, Sumie (Revista do Instituto de Medicina Tropical de Sao Paulo, 1990)