Meier, P.Scougall, C.Will, H.Burrell, C.Jilbert, A.Jilbert, A.Grgacic, E.Vickery, K.Burrell, C.Cossart, Y.2009-04-282009-04-28200411th International Symposium of Viral Hepatitis and Liver Disease, 2004 / A. R. Jilbert, E. Grgacic, K. Vickery, C. J. Burrell, Y. E. Cossart (eds.): pp. 295-2961877040266http://hdl.handle.net/2440/49490enA duck hepatitis B virus with a knock-out mutation in the X-ORF shows similar growth characteristics to wild-type.Conference paper00200941712009042810562536494Burrell, C. [0000-0002-4020-349X]Jilbert, A. [0000-0003-3855-1679]