1 Division of Community and Family Medicine, Jichi Medical University, Tochigi, Japan.
2 Department of General Internal Medicine, Fukushima Medical University, Fukushima, Japan.
3 Clinical Research Center, Shizuoka General Hospital, Shizuoka, Japan; Department of Endocrinology, Metabolism and Nephrology, Keio University School of Medicine, Tokyo, Japan.
4 Department of Anesthesiology and Perioperative Medicine, Tohoku University Graduate School of Medicine, Miyagi, Japan.
5 Department of Internal Medicine, Kitaibaraki City Hospital, Osaka, Japan.
6 Center for Innovative Research for Communities and Clinical Excellence (CiRC(2)LE), Fukushima Medical University, Fukushima, Japan. Electronic address: yoshioka.takashi.52a@kyoto-u.jp.