Chen H, Li Z, Feng S, Richard-Greenblatt M, et al. Femtomolar SARS-CoV-2 Antigen Detection Using the Microbubbling Digital Assay
with Smartphone Readout Enables Antigen Burden Quantitation and Tracking. Clin Chem 2021 Aug 12. pii: 6349222. doi: 10.1093.
PMID: 34383886