About the Authors

Seiji Shiota

Affiliation Department of Environmental and Preventive Medicine, Oita University Faculty of Medicine, Yufu, Japan

Rumiko Suzuki

Affiliation Department of Environmental and Preventive Medicine, Oita University Faculty of Medicine, Yufu, Japan

Yuichi Matsuo

Affiliation Department of Environmental and Preventive Medicine, Oita University Faculty of Medicine, Yufu, Japan

Muhammad Miftahussurur

Affiliation Department of Environmental and Preventive Medicine, Oita University Faculty of Medicine, Yufu, Japan

Trang Thu Huyen Tran

Affiliation Department of Environmental and Preventive Medicine, Oita University Faculty of Medicine, Yufu, Japan

Tran Thanh Binh

Affiliation Department of Environmental and Preventive Medicine, Oita University Faculty of Medicine, Yufu, Japan

Yoshio Yamaoka

yyamaoka@oita-u.ac.jp

Affiliations Department of Environmental and Preventive Medicine, Oita University Faculty of Medicine, Yufu, Japan, Department of Medicine-Gastroenterology, Michael E. DeBakey Veterans Affairs Medical Center and Baylor College of Medicine, Houston, Texas, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SS YY. Performed the experiments: YM MM TTHT TTB. Analyzed the data: SS RS YY. Contributed reagents/materials/analysis tools: YY. Wrote the paper: SS YY.