Age-dependent seroprevalence of SARS-CoV-2 antibodies in school-aged children from areas with low and high community transmission, Boey, Lise, Roelants Mathieu, Merckx Joanna, Hens Niel, Desombere I, Duysburgh Els, and Vandermeulen Corinne , European Journal of Pediatrics, Jan-02-2022, Volume 181, Issue 2, (2022)