1. Center for Pediatric Allergy and Rheumatology, KKR Sapporo Medical Center, Sapporo, Japan;
2. Department of Pediatrics, Kyoto Prefectural University of Medicine, Kyoto, Japan;
3. Department of Pediatrics, Shinshu University School of Medicine, Matsumoto, Japan;
4. Department of Infection and Immunology, Aichi Children’s Health and Medical Center, Obu, Japan;
5. Department of Pediatrics, Hokkaido University Hospital, Sapporo, Japan;
6. Division of Infectious Disease and Immunology, Saitama Children’s Medical Center, Omiya, Japan;
7. Department of Pediatrics, School of Medicine, Gunma University, Maebashi, Japan;
8. Department of Pediatrics, School of Medicine, Yokohama City University, Yokohama, Japan;
9. Department of Pediatrics, Kagoshima University Hospital, Kagoshima, Japan;
10. Department of Pediatrics, Saitama Medical Center, Saitama Medical University, Kawagoe, Japan;
11. Department of Dermatology, St. Luke’s International Hospital, Tokyo, Japan;
12. Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan;
13. Lifetime Clinical Immunology, Tokyo Medical and Dental University, Tokyo, Japan