About the Authors

Pei-Xi Wang

peixi001@163.com (PXW); zc_luo@yahoo.com (ZCL)

Affiliation Department of Preventive Medicine, School of Public Health, Guangzhou Medical University, Guangzhou, China

Jia-Ji Wang

Affiliation Department of Preventive Medicine, School of Public Health, Guangzhou Medical University, Guangzhou, China

Yi-Xiong Lei

Affiliation Department of Preventive Medicine, School of Public Health, Guangzhou Medical University, Guangzhou, China

Lin Xiao

Affiliation Department of Obstetrics and Gynecology, CHU Sainte-Justine, University of Montreal, Montreal, Canada

Zhong-Cheng Luo

peixi001@163.com (PXW); zc_luo@yahoo.com (ZCL)

Affiliation Department of Obstetrics and Gynecology, CHU Sainte-Justine, University of Montreal, Montreal, Canada

Competing Interests

The authors have no conflict of interest to declare.

Author Contributions

Conceived and designed the experiments: PXW JJW YXL LX ZCL. Performed the experiments: PXW JJW YXL LX ZCL. Analyzed the data: PXW LX ZCL. Contributed reagents/materials/analysis tools: PXW JJW YXL LX ZCL. Wrote the paper: PXW LX ZCL.