1 Department of Occupational Medicine, Chi Mei Medical Center, Tainan, Taiwan ; Southern Taiwan University of Science and Technology, Tainan, Taiwan.
2 United Nations University-International Institute for Global Health, UKM Medical Centre, 56000 Kuala Lumpur, Malaysia.
3 MOE-Shanghai Key Laboratory of Children's Environmental Health Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, China.