1. Department of Pediatrics, Nippon Kokan Hospital, Kawasaki
2. Laboratory of Virology, Research Institute for Disease Mechanism and Control, Nagoya University School of Medicine, Nagoya
3. Department of Cardiology, Tokyo Metropolitan Kiyose Children's Hospital, Toyoake, Japan
4. Department of Pediatrics, Yokohama Rosai Hospital, Toyoake, Japan
5. Department of Virology, Yokohama City Institute of Health, Toyoake, Japan
6. Department of Pediatrics, Fujita Health University School of Medicine, Toyoake, Japan