Department of Cardiovascular Medicine, Saga University, Saga, Japan. tanakaa2@cc.saga-u.ac.jp. Department of Diabetes, Endocrinology, and Metabolism, Fukushima Medical University, Fukushima, Japan. The First Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Kitakyusyu, Japan. Department of Cardiology, Dokkyo Medical University Koshigaya Hospital, Koshigaya, Japan. Department of Cardiovascular Medicine, Kitasato University Graduate School of Medical Sciences, Sagamihara, Japan. Department of Cardiology, Tokyo Medical University, Tokyo, Japan. Department of Cardiovascular Medicine, JR Hiroshima Hospital, Hiroshima, Japan. Division of Cardiovascular Medicine, Diabetes Care Center, Jinnouchi Hospital, Kumamoto, Japan. Clinical Research Center, Saga University, Saga, Japan. Department of Global Clinical Research, Graduate School of Medicine, Chiba University, Chiba, Japan. Clinical Research and Quality Management Center, University of the Ryukyus Hospital, Nishihara, Japan. Department of Cardiovascular Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan. Department of Endocrinology and Metabolism, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan. Division of Cardiology, Yokohama City University Medical Center, Yokohama, Japan. Department of Cardiovascular Medicine, Dokkyo Medical University, Mibu, Japan. Department of Cardiovascular Medicine, Saga University, Saga, Japan. Department of Cardiovascular Regeneration and Medicine, Research Institute for Radiation Biology and Medicine, Hiroshima University, Hiroshima, Japan. Department of Clinical Pharmacology and Therapeutics, University of the Ryukyus, Nishihara, Japan. Department of Cardiovascular Medicine, Saga University, Saga, Japan. node@cc.saga-u.ac.jp.