1. Department of Cardiovascular Medicine, Graduate School of Biomedical and Health Sciences Hiroshima University Hiroshima Japan
2. Medical Division, Health Service Center Hiroshima University Higashihiroshima Japan
3. Department of Cardiovascular Surgery Hiroshima University Hospital Hiroshima Japan
4. Medical Division, Technical Center Hiroshima University Hiroshima Japan
5. Department of Oral and Maxillofacial Pathobiology, Graduate School of Biomedical and Health Sciences Hiroshima University Hiroshima Japan
6. Department of Surgery, Graduate School of Biomedical and Health Sciences Hiroshima University Hiroshima Japan