1. The Second Department of Internal Medicine, Osaka Medical College, Japan
2. Hokusetsu General Hospital, Japan
3. Moriguchi Keijinkai Hospital, Japan
4. Ishikiri Seiki Hospital, Japan
5. Hirakata City Hospital, Japan
6. Hanwasumiyoshi General Hospital, Japan
7. Aoyama Hospital, Japan
8. Seikeikai Hospital, Japan
9. Settsu Clinic, Japan