About the Authors

Xiaohua Liang

Affiliations Ministry of Education Key Laboratory of Child Development and Disorders, Key Laboratory of Pediatrics in Chongqing, Chongqing International Science and Technology Cooperation Center for Child Development and Disorders, Children's Hospital, Chongqing Medical University, Chongqing, People's Republic of China, Centers for Disease Control and Prevention of Jiulongpo District, Chongqing, People's Republic of China

Jie Chen

Affiliation Ministry of Education Key Laboratory of Child Development and Disorders, Key Laboratory of Pediatrics in Chongqing, Chongqing International Science and Technology Cooperation Center for Child Development and Disorders, Children's Hospital, Chongqing Medical University, Chongqing, People's Republic of China

Youxue Liu

Affiliation Ministry of Education Key Laboratory of Child Development and Disorders, Key Laboratory of Pediatrics in Chongqing, Chongqing International Science and Technology Cooperation Center for Child Development and Disorders, Children's Hospital, Chongqing Medical University, Chongqing, People's Republic of China

Chunling He

Affiliation Centers for Disease Control and Prevention of Jiulongpo District, Chongqing, People's Republic of China

Tingyu Li

tyli@vip.sina.com

Affiliation Ministry of Education Key Laboratory of Child Development and Disorders, Key Laboratory of Pediatrics in Chongqing, Chongqing International Science and Technology Cooperation Center for Child Development and Disorders, Children's Hospital, Chongqing Medical University, Chongqing, People's Republic of China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: XL JC YL TL. Performed the experiments: XL JC YL CH. Analyzed the data: XL. Contributed reagents/materials/analysis tools: XL JC YL. Wrote the paper: XL TL.