About the Authors

Dongge Cai

Affiliations Department of Obstetrics and Gynecology, the First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, P. R. China, Department of Obstetrics and Gynecology, the Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, P. R. China

Zhongliang Zhu

Affiliations Shaanxi Province Biomedicine Key Laboratory, College of Life Science, Northwest University, Xi’an, Shaanxi, P. R. China, Department of Pharmacology, Xi'an Jiaotong University Health Science Center, Xi’an, Shaanxi, P. R. China

Hongli Sun

Affiliation Shaanxi Institute of Pediatric Diseases, Xi’an Children’s Hospital, Shaanxi, P.R. China

Yanhua Qi

Affiliation Department of Ultrasound, the Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, P. R. China

Lanying Xing

Affiliation Department of Obstetrics and Gynecology, the Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, P. R. China

Xiaogui Zhao

Affiliation Department of Obstetrics and Gynecology, the Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, P. R. China

Qiuyuan Wan

Affiliation Department of Obstetrics and Gynecology, the Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, P. R. China

Qian Su

Affiliation Department of Neonatology, the First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, P. R. China

Hui Li

yongyy123@yeah.net

Affiliation Department of Neonatology, the First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, P. R. China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceptualization: DC. Formal analysis: QW. Funding acquisition: HL ZZ. Investigation: QS. Methodology: YQ. Project administration: HL ZZ. Resources: YQ. Software: LX. Supervision: HL. Validation: XZ. Visualization: ZZ. Writing – original draft: DC. Writing – review & editing: ZZ HS.