The effect of sample site, illness duration, and the presence of pneumonia on the detection of SARS-CoV-2 by real-time reverse transcription PCR

by Sutjipto, S., Lee, P.H., Tay, J.Y., Mendis, S.M., Abdad, M.Y., Marimuthu, K., Ng, O.T., Cui, L., Chan, M., Soon, M., Lin, R.T.P., Leo, Y.-S., De, P.P., Barkham, T., Vasoo, S., National Centre for Infectious Diseases COVID-19 Outbreak Research Team.
Published 2021