1 Department of Dermatology, Division of Endocrinology and Metabolism, Hematology, Rheumatology and Respiratory Medicine, Kagawa University, Kagawa, Japan. E-mail: kozo@kms.ac.jp.
2 Department of Internal Medicine, Division of Endocrinology and Metabolism, Hematology, Rheumatology and Respiratory Medicine, Kagawa University, Kagawa, Japan.
3 Department of Diagnostic Pathology, Faculty of Medicine, Kagawa University, Kagawa, Japan.
4 Department of Neurology, Kumamoto University Hospital, Kumamoto, Japan.