1. Department of Diagnostic Pathology, Faculty of Medicine, Miyazaki University Hospital, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki 889-1692, Japan
2. Department of Obstetrics and Gynecology, Miyazaki Prefectural Nichinan Hospital, 1-9-5, Kiyama, Nichinan, Miyazaki 887-0013, Japan
3. Department of Diagnostic Pathology, Miyazaki Prefectural Nichinan Hospital, 1-9-5, Kiyama, Nichinan, Miyazaki 887-0013, Japan
4. Department of Pathology, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki 889-1692, Japan
5. Department of Obstetrics and Gynecology, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki 889-1692, Japan