**Author details**

Amornrat Ratanasiri1 \*, Thitima Nutravong2 , Supaporn Chatrchaiwiwatana3 , Arisara Poosari<sup>2</sup> , Thawalrat Ratanasiri2 and Kanokporn Wongchalee3

1 Department of Community Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand

2 Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand

3 Faculty of Dentistry, Khon Kaen University, Khon Kaen, Thailand

\*Address all correspondence to: amorat@kku.ac.th

© 2021 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.
