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, Márcio Sommer; Micelli, Antonio C (Journal of Global Health, 2021)