Diffusion-in-gel enzyme-linked immunosorbent assay (dig-elisa) for chagas' disease serodiagnosis - Requejo, H I V; Nakamura, P M; Vaz, A J; Pialarissi, C S M; Hoshino-Shimizu, Sumie; Matsumoto, T K; Nakamura, H (Brazilian Journal of Medical and Biological Research, 1991)