1. Department of Obstetrics and Gynecology, Kochi Medical School, Kochi University, Nankoku, Kochi 783‑8505, Japan
2. Integrated Center for Advanced Medical Technologies (ICAM‑Tech), Kochi Medical School Hospital, Kochi University, Nankoku, Kochi 783‑8505, Japan
3. Medical Course, Kochi Medical School, Kochi University, Nankoku, Kochi 783‑8505, Japan
4. Department of Disaster and Emergency Medicine, Kochi Medical School, Kochi University, Nankoku, Kochi 783‑8505, Japan