CD40LG and COVID-19: Concordance metrics between two SARS-CoV-2 antibody assays: The BioMedomics COVID-19 IgM/IgG Rapid Test and the Roche Elecsys Anti-SARS-CoV-2 including A) all negative and positive specimens, B) negative specimens on Elecsys and specimens with higher Elecsys antibody titers (excluding specimens with Elecsys optical density values <10), and C) negative specimens on Elecsys and specimens with lower Elecsys antibody titers (excluding specimens with Elecsys optical density values ≥10).