Department of Endocrinology and Metabolism, Uonuma Institute of Community Medicine, Niigata University Medical and Dental Hospital, Japan. Department of Nephrology, Uonuma Institute of Community Medicine, Niigata University Medical and Dental Hospital, Japan. Department of Respiratory Medicine, Uonuma Institute of Community Medicine, Niigata University Medical and Dental Hospital, Japan. Department of Neurology, Uonuma Institute of Community Medicine, Niigata University Medical and Dental Hospital, Japan. Department of Radiology, Uonuma Institute of Community Medicine, Niigata University Medical and Dental Hospital, Japan. Department of Emergency and Critical Care Medicine, Uonuma Institute of Community Medicine, Niigata University Medical and Dental Hospital, Japan.