About the Authors

Chang Ho Yu

Affiliation Division of Exposure Science, Environmental and Occupational Health Sciences Institute, Rutgers University, Piscataway, New Jersey, United States of America

Xianlei Zhu

Affiliation College of Geosciences, China University of Petroleum, Beijing, People’s Republic of China

Zhi-hua Fan

zfan@eohsi.rutgers.edu

Affiliation Division of Exposure Science, Environmental and Occupational Health Sciences Institute, Rutgers University, Piscataway, New Jersey, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: CHY ZF. Performed the experiments: XZ. Analyzed the data: CHY. Wrote the paper: CHY. Revised the manuscript: ZF XZ.