1. Department of Pediatrics, Tohoku University Hospital, Sendai, Japan
2. Department of Pediatric Neurology, Miyagi Children’s Hospital, Sendai, Japan
3. Department of Pediatrics, JCHO Sendai Hospital, Sendai, Japan
4. Department of Pediatrics, Iwate Prefectural Central Hospital, Morioka, Japan
5. Department of Gynecology and Obstetrics, Tohoku University Hospital, Sendai, Japan
6. Department of Pediatrics, National Hospital Organisation Sendai Medical Center, Sendai, Japan
7. Department of Pediatrics, JR Sendai Hospital, Sendai, Japan
8. Department of Pediatrics, Sendai City Hospital, Sendai, Japan