1) Tohoku Kosei Nenkin Hospital, Sendai, Japan
2) Miyagi Social Insurance Hospital, Sendai, Japan
3) Gunma Chuo Sogo Hospital, Maebashi, Japan
4) Saitama Shakai Hoken Byouin, Saitama, Japan
5) Social Insurance Chuo General Hospital, Tokyo, Japan
6) Hoshigaoka Kosei Nenkin Hospital, Osaka, Japan
7) Isahaya Health Insurance General Hospital, Isahaya, Japan

Koichi Tabayashi¹⁾, Motoyasu Ishii²⁾, Masahiko Tashiro³⁾, Yoichirou Hosoda⁴⁾, Masako Miyagawa⁵⁾, Keiko Ito⁶⁾, Kimiko Nakamura⁷⁾