1. School of Medicine, Hirosaki University, Hirosaki, Aomori, 036-8560, Japan
2. Department of Pathology and Bioscience, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori 036‑8562, Japan
3. Department of Internal Medicine, Toho University Ohmori Medical Center, Ohta, Tokyo 143‑8541, Japan