About the Authors

Qingsong Chen

Affiliation Guangdong Prevention and Treatment Center for Occupational Diseases, Guangzhou, China

Li Lang

Affiliation Guangdong Prevention and Treatment Center for Occupational Diseases, Guangzhou, China

Wenzhe Wu

Affiliation Guangdong Prevention and Treatment Center for Occupational Diseases, Guangzhou, China

Guoyong Xu

Affiliation Guangdong Prevention and Treatment Center for Occupational Diseases, Guangzhou, China

Xiao Zhang

Affiliation Guangdong Prevention and Treatment Center for Occupational Diseases, Guangzhou, China

Tao Li

tree52013@yahoo.com.cn (TL); huanghl@gdoh.org (HH)

Affiliation National Institute of Occupational Health and Poison Control of the Chinese Center for Disease Control and Prevention, Beijing, China

Hanlin Huang

tree52013@yahoo.com.cn (TL); huanghl@gdoh.org (HH)

Affiliation Guangdong Prevention and Treatment Center for Occupational Diseases, Guangzhou, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: TL HLH QSC. Performed the experiments: QSC WZW GYX XZ. Analyzed the data: QSC LL WZW. Contributed reagents/materials/analysis tools: QSC TL HLH GYX. Wrote the paper: QSC LL WZW.