1. Department of Molecular Diagnostic Pathology, School of Medicine, Iwate Medical University, Yahaba, Iwate 028‑3695, Japan
2. Department of Obstetrics and Gynecology, School of Medicine, Iwate Medical University, Yahaba, Iwate 028‑3695, Japan
3. Department of Molecular Biology, Sapporo Medical University School of Medicine, Sapporo, Hokkaido 060‑8556, Japan