1. Department of Gastroenterology and Hematology; Shiga University of Medical Science; Ohtsu Shiga 520-2192 Japan
2. Department of Pathology; Shiga University of Medical Science; Ohtsu Shiga 520-2192 Japan
3. Department of Gynecology; Shiga University of Medical Science; Ohtsu Shiga 520-2192 Japan