Molecular evolutionary analysis of the influenza A(H1N1)pdm, May-September, 2009: temporal and spatial spreading profile of the viruses in Japan. oleh Teiichiro Shiino, Nobuhiko Okabe, Yoshinori Yasui, Tomimasa Sunagawa, Makoto Ujike, Masatsugu Obuchi, Noriko Kishida, Hong Xu, Emi Takashita, Akane Anraku, Reiko Ito, Teruko Doi, Miho Ejima, Hiromi Sugawara, Hiroshi Horikawa, Shuji Yamazaki, Yumiko Kato, Akio Oguchi, Nobuyuki Fujita, Takato Odagiri, Masato Tashiro, Haruo Watanabe