Clinical features of cases of influenza A (H1N1)v in Osaka prefecture, Japan, May 2009 Komiya, N and Gu, Y and Kamiya, H and Yahata, Y and Matsui, T and Yasui, Y and Okabe, N, Eurosurveillance, 14, 19272 (2009), https://doi.org/10.2807/ese.14.29.19272-en