Binomial nomenclature for virus species: a consultation by Siddell, SG, Walker, PJ, Lefkowitz, EJ, Mushegian, AR, Dutilh, BE, Harrach, B, Harrison, RL, Junglen, S, Knowles, NJ, Kropinski, AM, Krupovic, M, Kuhn, JH, Nibert, ML, Rubino, L, Sabanadzovic, S, Simmonds, P, Varsani, A, Zerbini, FM, Davison, AJ