COVID-19(50) SARS-CoV-2(28) Hemodialysis(16) Patient(14) antibody(12) acute respiratory syndrome(12) coronavirus disease(12) coronavirus(11) positive(10) Follow-up(10) Presence(8) Abstract(8) AKI(8) IgG(8) Antibody Response(8) dialysis(7) acute respiratory syndrome coronavirus(6) Coronavirus disease 2019(6) Seroconversion(6) the SARS-CoV-2(6) SARS-CoV-2 antibody(6) acute respiratory syndrome coronavirus 2(6) severe acute respiratory syndrome Coronavirus(6) subsequent(6) baseline(6) transplantation(6) Prevent(6) humoral(6) Evolution(6) 95% confidence interval(6)