1. Department of Gastric Surgery National Cancer Center Hospital East Kashiwa Japan
2. Department of Pathology and Clinical Laboratories National Cancer Center Hospital East Kashiwa Japan
3. Division of Surgical Oncology, Department of Surgery Nagoya University Graduate School of Medicine Nagoya Japan
4. Department of Pathology, Exploratory Oncology Research & Clinical Trial Center (EPOC) National Cancer Center Kashiwa Japan