1 Department of General Internal Medicine, Okayama City Hospital, Okayama, Japan; Department of Emergency Medicine, Okayama City Hospital, Okayama, Japan. Electronic address: superonewex0506@yahoo.co.jp.
2 Department of General Internal Medicine, Okayama City Hospital, Okayama, Japan; Department of Endocrinology, Okayama City Hospital, Okayama, Japan.
3 Department of Endocrinology, Okayama City Hospital, Okayama, Japan.