[1] Mahidol Univ, Fac Publ Hlth, Dept Occupat Hlth & Safety, Bangkok, Thailand
[2] MHESI, Ctr Excellence Environm Hlth & Toxicol EHT, OPS, Bangkok, Thailand
[3] Univ Occupat & Environm Hlth, Inst Ind Ecol Sci, Dept Environm Epidemiol, Kitakyushu, Fukuoka, Japan
[4] Srinakharinwirot Univ, Fac Phys Educ, Dept Publ Hlth, Nakhon Nayok, Thailand
[5] Naresuan Univ, Fac Publ Hlth, Program Occupat Hlth & Safety, Phitsanulok, Thailand
[6] Suranaree Univ Technol, Inst Publ Hlth, Nakhon Ratchasima, Thailand
[7] Lampang Rajabhat Univ, Fac Ind Technol, Lampang, Thailand
[8] Univ Occupat & Environm Hlth, Sch Hlth Sci, Dept Occupat Safety & Hlth Management, Kitakyushu, Fukuoka, Japan