1. Department of Pediatrics, Konan Kosei Hospital, Konan, Aichi, Japan
2. Department of Pediatrics, Toyokawa Municipal Hospital, Toyokawa, Aichi, Japan
3. Department of Pediatrics, Fujita Health University School of Medicine, Toyoake, Aichi, Japan
4. Department of Virology and Parasitology, Fujita Health University School of Medicine, Toyoake, Aichi, Japan