1. General Medicine and Primary Care, Tokushima University Hospital, Tokushima, Japan
2. Department of General Medicine, Institute ofBiomedical Sciences, the University of Tokushima Graduate School, Tokushima, Japan
3. Tokushima Prefectural Central Hospital, Tokushima,Japan
4. Yoshinogawa Medical Center, Tokushima, Japan
5. Ehime Prefectural Central Hospital, Ehime, Japan
6. Tokyo Bei Urayasu IchikawaMedical Center, Chiba, Japan
7. Naruto Yamakami Hospital, Tokushima, Japan