Ethics approval and consent to participate
This study was conducted in accordance with the Declaration of Helsinki, and the study protocol was reviewed and approved by the Ethics Committees of the Research Ethics Committee of the Faculty of Medicine, University of Miyazaki (Approval number: O-0003). Informed consent was omitted and information of this study was disclosed in the form of opt-out on our hospital website. Information regarding the conduct of the research including the objectives was disclosed and the research subjects were provided an opportunity to refuse inclusion in the research.
Consent for publication
Not applicable.
Availability of data and materials
The datasets used and/or analysed during the current study are available from the corresponding author (TM) on reasonable request.
Competing interests
The authors declare no conflicts of interest for this article.
Funding
There was no funding for this study.
Authors’ contributions
YK1 corresponding to Yoko Kubuki. YK2 corresponding to Yoshimasa Kubota. YA1 corresponding to Yutaka Akiyama. YA2 corresponding to Yasuji Arimura. HK1 corresponding to Hiroshi Kawakami. HK2 corresponding to Hiroaki Kataoka.
TM and HK1 contributed equally to this work.
TM, HK1, TK, SY, YT, TH, YK1, KY, YA1, YK2, HK2, and KS conducted the study. TM and YS performed endoscopy. TM, TK, TH and YK1 collected the data. TM assessed image enhanced endoscopic findings. TM, HK1, and YA2 interpreted the data. TM, HK1, and YA2 analyzed the data. KY, YA1, and HK2 performed the histological examination. TM and HK1 drafted the manuscript. All authors read and approved the final draft.
Acknowledgment
Not applicable
Author details
1 Department of Gastroenterology and Hepatology, Division of Endoscopy and Center for Digestive Disease, University of Miyazaki Hospital, 5200 Kihara, Kiyotake, 889-1692 Miyazaki, Japan. 2 Division of Gastroenterology and Hematology, Department of Internal Medicine, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, 889-1692 Miyazaki, Japan. 3 Division of Gastroenterology and Hepatology, Department of Internal Medicine, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, 889-1692 Miyazaki, Japan. 4 Department of Diagnostic Pathology, Kochi University Hospital, 185-1 Kohasu, Oko-cho, Nankoku-shi, Kochi 783-8505, Japan. 5 Section of Oncopathology and Regenerative Biology, Department of Pathology, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, 889-1692 Miyazaki, Japan. 6 Clinical Research Support Center, University of Miyazaki Hospital, 5200 Kihara, Kiyotake, 889-1692 Miyazaki, Japan.