1. Department of Pathology, Jikei University Katsushika Medical Center
2. Department of Clinical Laboratory Sciences, School of Health Sciences, Fukushima Medical University
3. Department of Pathology, Jikei University Kashiwa Hospital
4. Department of Pathology, Jikei University Hospital
5. Department of Obstetrics and Gynaecology, Jikei University Katsushika Medical Center
6. Department of Obstetrics and Gynaecology, Jikei University Daisan Hospital
7. Department of Obstetrics and Gynaecology, Jikei University School of Medicine