1. Medical Corporation Kano Clinic, 2-5-2 Nippombashi, Chuo-ku, Osaka 542-007, Japan
2. Shimizu Clinic, 7454-1 Ooaza-tomioka, Takeocho, Takeo City, Saga 843-0024, Japan
3. Department of Gynecology, National Hospital Organization Osaka, Minami Medical Center, 2-1 Kidohigashicho, Kawachinagano City, Osaka 586-0001, Japan
4. Toyodo Hijikata Clinic, 3-11-29 Kasuga, Ibaraki City, Osaka 567-0031, Japan