Boni, M., Lemey, P., Jiang, X., Lam, T., Perry, B., Castoe, T., Rambaut, A. & Robertson, D. 2020, 'Evolutionary origins of the SARS-CoV-2 sarbecovirus lineage responsible for the COVID-19 pandemic', Nature Microbiology, 5(11), pp. 1408-1417. http://dx.doi.org/10.1038/s41564-020-0771-4