Department of Gastroenterology and Hepatology;
Nihon University Surugadai Hospital;
1-8-13;
Kandasurugadai;
Chiyoda-ku;
Tokyo 101-8309;
Japan;
Department of Pathology;
Nihon University School of Medicine;
30-1;
Oyaguchikamimachi;
Itabashi-ku;
Tokyo 101-8309;
Japan;