Observed association between the HA1 mutation D222G in the 2009 pandemic influenza A(H1N1) virus and severe clinical outcome, Norway 2009-2010
Kilander, A and Rykkvin, R and Dudman, S G and Hungnes, O, Eurosurveillance, 15, 19498 (2010), https://doi.org/10.2807/ese.15.09.19498-en