1. Department of Pediatric Dentistry, School of Dentistry Kanagawa Dental University Yokosuka Kanagawa Japan
2. Department of Dentistry Kanagawa Children's Medical Center Yokohama Kanagawa Japan
3. Clinical Research Institute Kanagawa Children's Medical Center Yokohama Kanagawa Japan
4. Hayama Childrens’ Dental Clinic Medi‐style, Incorporated Medical Institution Hayama Kanagawa Japan