1. Kagawa Medical University; Kagawa 761-0793 Japan
2. Kochi Medical School; Nankoku Kochi 783-8505 Japan
3. Okayama University Medical School; Okayama Okayama 700-8558 Japan
4. National Okayama Medical Center; Okayama Okayama 701-1192 Japan
5. National Hiroshima Hospital; Higashihiroshima Hiroshima 739-0041 Japan
6. Uwajima Municipal Hospital; Uwajima Ehime 798-0061 Japan
7. National Ehime Hospital; Ehime 791-0203 Japan
8. Kawasaki Medical School; Kurashiki Okayama 701-0114 Japan