1. Division of Nephrology, Endocrinology and Vascular Medicine, Tohoku University Graduate School of Medicine, Japan
2. Division of Blood Purification, Tohoku University Hospital, Japan
3. Department of Pathology, Tohoku University Hospital, Japan
4. Department of Surgery, Tohoku University Graduate School of Medicine, Japan
5. Department of Dermatology, Tohoku University Graduate School of Medicine, Japan