1. Department of Surgery II, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan.
2. Department of Dermatology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan.
3. Tsurudome Breast and Coloproctology Clinic, Kitakyushu, Japan.
4. Department of Pathology and Cell Biology II, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan.