The "false-positive" conundrum: IgA reference level overestimates the seroprevalence of antibodies to SARS-CoV-2 - Caramelli, Bruno; Escalante-rojas, Maria C.; Chauhan, Hiteshi K. C.; Siciliano, Rinaldo F.; Bittencourt, Marcio S.; Micelli, Antonio C. (Journal of global health, 2021)