Characterisation of the transcriptome and proteome of SARS-CoV-2 reveals a cell passage induced in-frame deletion of the furin-like cleavage site from the spike glycoprotein - Davidson, AD; Williamson, MK; Lewis, S; Shoemark, D; Carroll, MW; Heesom, KJ; Zambon, M; Ellis, J; Lewis, PA; Hiscox, JA; Matthews, DA (GENOME MEDICINE, 2020)