1. Department of Neonatology, Gifu Prefectural General Medical Center, Japan
2. Department of Paediatric Cardiology, Elisabeth Children’s Hospital, Klinikum Oldenburg, Rahel-Straus-Strasse, Oldenburg, Germany
3. Department of Industrial Management and Engineering, Tokyo University of Science, Tokyo, Japan
4. Department of Obstetrics and Gynecology, Gifu Prefectural General Medical Center, Japan