1. From the Department of Pediatrics, Tohoku University School of Medicine, Sendai, Japan;
2. Department of Diagnostic Reagents, Otsuka Pharmaceutical Company, Ltd, Tokushima, Japan;
3. Sapporo Kousei General Hospital, Sapporo, Japan;
4. Wakayama Rosai Hospital, Wakayama, Japan;
5. Kurume University School of Medicine, Kurume, Japan;
6. Social Insurance Ohmiya General Hospital, Ohmiya, Japan; and
7. Osaka University School of Medicine, Suita, Japan.