1. From the Department of Dermatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
2. Department of Child Psychosomatic Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
3. Department of Locomotive Pain Center, Division of Rheumatic Diseases Okayama University Hospital, Okayama, Japan E-mail: emiyoko1203@smile.ocn.ne.jp