A genomic view of experimental intraspecies and interspecies transformation of a rifampicin-resistance allele into Neisseria meningitidis by Alfsnes, K, Frye, SA, Eriksson, J, Eldholm, V, Bynildsrud, O, Bohlin, J, Harrison, OB, Hood, DW, Maiden, MCJ, Tonjum, T, Ambur, OH