1. Biochemical Laboratory, Nitto Boseki Co., Ltd., Fukushima, Japan.
2. Clinical Proteomics Research Center, Chiba University Hospital, Chiba City, Chiba, Japan.
3. Department of Biochemistry, Dokkyo University School of Medicine, Tochigi, Japan.
4. Department of Obstetrics & Gynecology, Dokkyo University School of Medicine, Tochigi, Japan.
5. Department of Molecular Diagnosis, Graduate School of Medicine, Chiba University, Chiba City, Chiba, Japan.