| Authors: |
Harnpicharnchai K; Occupational Health and Safety, Faculty of Public Health, Mahasarakham University, Thailand., Srikulvong P; Occupational Health and Safety, Faculty of Public Health, Mahasarakham University, Thailand., Aksorn P; Occupational Health and Safety, Faculty of Public Health, Mahasarakham University, Thailand., Chalawlerd R; Occupational Health and Safety, Faculty of Public Health, Mahasarakham University, Thailand., Phoklang W; Occupational Health and Safety, Faculty of Public Health, Mahasarakham University, Thailand., Saengdang P; Occupational Health and Safety, Faculty of Public Health, Mahasarakham University, Thailand.; Occupational and Environmental Health (International Program), Faculty of Public Health, Thammasat University, Thailand. |