Santos, A.P. de T. et al. 2022. Characterization of primary direct-acting antiviral (DAA) drugs resistance mutations in NS5A/NS5B regions of hepatitis C virus with genotype 1a and 1b from patients with chronic hepatitis. Revista do Instituto de Medicina Tropical de São Paulo. 64, (Oct. 2022), e61. DOI:https://doi.org/10.1590/S1678-9946202264061.