1 Department of Infectious Diseases and Immunology, Division of Infectious Diseases and Immunology, Saitama Children's Medical Center, 1-2 Shintoshin, Chuou-ku, Saitama-shi, Saitama, 330-8777, Japan.
2 Department of Infectious Diseases and Immunology, Division of Infectious Diseases and Immunology, Saitama Children's Medical Center, 1-2 Shintoshin, Chuou-ku, Saitama-shi, Saitama, 330-8777, Japan. sato.satoshi@scmc.pref.saitama.jp.
3 Department of Dermatology, Saitama Children's Medical Center, 1-2 Shintoshin, Chuou-ku, Saitama-shi, Saitama, 330-8777, Japan.