[1] Univ Fed Sao Paulo, Div Infect Dis, Sao Paulo, Brazil
[2] Minist Hlth Paraguay, Natl Hosp Itaugua, Asuncion, Paraguay
[3] Univ Fed Sao Paulo, Blood Bank, Sao Paulo, Brazil
[4] Natl Hosp Itaugua, Haemodialysis Ctr, Itaugua, Paraguay
[5] Emergency Med Hosp Dr Luiz M Argana, Haemodialysis Ctr, Asuncion, Paraguay
[6] Univ Fed Sao Paulo, Kidney & Hypertens Hosp Oswaldo Ramos, Sao Paulo, Brazil