Anti-SARS-CoV-2 antibodies among indigenous populations of the Brazilian Amazon: a cross-sectional study. - Lima CNC; Abreu IN; Rodrigues EPS; Freitas VO; Botelho BJS; Souza SL; Cayres-Vallinoto I; Guerreiro JF; Ishak R; Vallinoto ACR (BMJ open, 2022)