Acknowledgements
The authors are grateful to the managers, their staffs and
all the employees at the assembly section in the battery
manufacturing plant in Bangkok, Thailand for providing
necessary facilities and their valuable collaboration for this
research. Our thanks are due to Dr. Pachanee Suwannasri
and Assistant Professor Tanongsak Yingratanasuk, Faculty
of Public Health, Burapha University, Chonburi, Thailand
for their technical assistanc