**Author details**

Thawalsak Ratanasiri1 , Natakorn I. Tuporn2 , Somnuk Apiwantanagul3 , Thitima Nutrawong4 , Thawalrat Ratanasiri4 and Amornrat Ratanasiri<sup>5</sup> \*

1 Khon Kaen Hospital, Khon Kaen, Thailand

2 Chiang Rai College, Chiang Rai, Thailand

3 Sakon Nakhon Hospital, Sakon Nakhon, Thailand

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

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

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

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