TY - RPRT TI - Emergence of SARS-CoV-2 through Recombination and Strong Purifying Selection AU - Li, X. AU - Giorgi, E. E. AU - Marichann, M. H. AU - Foley, B. AU - Xiao, C. AU - Kong, X.-p. AU - Chen, Y. AU - Korber, B. AU - Gao, F. PY - 2020 DO - 10.1101/2020.03.20.000885 UR - https://www.biorxiv.org/content/10.1101/2020.03.20.000885v1 ID - 10.1101/2020.03.20.000885 ER -