Jichi Medical University, Jichi Medical University, Nihon University, Chiba University, Jichi Medical University, Keio University, Mie University, Chiba University, Nagasaki University, Hamamatsu University, Kanagawa Prefectural Institute of Public Health, St. Marianna University School of Medicine, Hyogo Prefecture Kobe Children Hospital, Hyogo Prefecture Kobe Children Hospital, St. Marianna University School of Medicine and Jichi Medical University - Department of Public Health