1. Department of Gastroenterology, Aichi Cancer Center Hospital, Nagoya, Japan
2. Department of Endoscopy, Aichi Cancer Center Hospital, Nagoya, Japan
3. Department of Pathology and Molecular Diagnostics, Aichi Cancer Center Hospital, Nagoya, Japan
4. Department of Respiratory Medicine, Handa Municipal Hospital, Nagoya, Japan
5. 2nd Department of Internal Medicine, Osaka Medical College, Osaka, Japan