Comparison of Dried Blood Spots and Venous Blood for the Detection of SARS-CoV-2 Antibodies in a Population of Nursing Home Residents oleh Eline Meyers, Stefan Heytens, Asangwing Formukong, Hanne Vercruysse, An De Sutter, Tom Geens, Kenneth Hofkens, Heidi Janssens, Eveline Nys, Elizaveta Padalko, Ellen Deschepper, Piet Cools