Terumi Kamisawa, MD, Tokyo Metropolitan Komagome Hospital, Department of Internal Medicine, 3-18-22 Honkomagome, Bunkyo-ku, Tokyo 113-8677, Japan Jae Bock Chung MD Ph.D., Yonsei University College of Medicine, Department of Internal Medicine, 50-1 Yonsei-ro, Seodaemun-gu, 120-752 Seoul, Korea, Republic of (South Korea)