de Paula Eduardo, F., Bezinelli, L. M., de Araujo, C. A. R., Moraes, J. V. V., Birbrair, A., Pinho, J. R. R., Hamerschlak, N., Al-Hashimi, I., & Heller, D. (2021). Self-collected unstimulated saliva, oral swab, and nasopharyngeal swab specimens in the detection of SARS-CoV-2. Clinical Oral Investigations, 26(2), 1561–1567. https://doi.org/10.1007/s00784-021-04129-7