Trypanosoma cruzi: detection of a circulating antigen in urine of chagasic patients sharing common epitopes with an immunodominant repetitive antigen - Umezawa, Eufrosina Setsu; Shikanai Yasuda, Maria Aparecida; Silveira, J F; Cotrim, Paulo César; Paranhos, G S; Katzin, Alejandro Miguel (Experimental Parasitology, 1993)