Possible pandemic threat from new reassortment of influenza A(H7N9) virus in China Meng, Z and Han, R and Hu, Y and Yuan, Z and Jiang, S and Zhang, X and Xu, J, Eurosurveillance, 19, 20699 (2014), https://doi.org/10.2807/1560-7917.ES2014.19.6.20699