Daisuke Tanaka, Junko Isobe, Masanori Watahiki, Yoshiyuki Nagai, Chihiro Katsukawa, Ryuji Kawahara, Miyoko Endoh, Rumi Okuno, Nanako Kumagai, Masakado Matsumoto, Yoshiro Morikawa, Tadayoshi Ikebe, Haruo Watanabe
and and the Working Group for Group A Streptococci in Japan