**Author details**

Ngoan Tran Le1,2\* and Hang Viet Dao3,4

1 Institute of Research and Development, Duy Tan University, Da Nang, Vietnam

2 Department of Public Health, International University of Health and Welfare, Narita City, Japan

3 Department of Internal Medicine, Hanoi Medical University, Hanoi City, Vietnam

4 Institute of Gastroenterology and Hepatology, Hanoi City, Vietnam

\*Address all correspondence to: letranngoan@yahoo.com; letngoan@hmu.edu.vn

© 2020 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
