SARS-CoV-2(99) COVID-19(58) diagnostic(46) supplementary material(38) COVID-19 pandemic(37) sensitivity(34) Abstract(32) Diagnosis(28) antibody(27) Protein(26) Viral(25) molecular(25) Analysis(22) stability(21) approach(21) nucleocapsid protein(21) Accuracy(21) Concentration(20) reported(19) point-of-care(19) SARS-CoV-2.(19) Spread(18) RNA(18) immunoassay(18) mass spectrometry(18) Spike protein(17) Research(17) homogeneity(17) positive(17) performed(17)