Institution: | 1.School of Health Science, Environmental Health, Mae Fah Luang University, Chiang Rai, Thailand ;2.School of Health Science, Occupational Health and Safety, Mae Fah Luang University, Chiang Rai, Thailand ;3.Department of Social and Environmental Medicine, Faculty of Tropical Medicine, Mahidol University, Bankok, Thailand ;4.Department of Civil Engineering, Faculty of Engineering, Thammasat University, Pathum Thani, Thailand ; |