About the Authors

Yang Mi

Affiliation Obstetrical department, Maternal and Child Health Hospital of Shaanxi Province, Xi'an, ShaanXi, Peoples' Republic of China

Lijuan Wang

ljwangdr@gmail.com (L.J.W); pu_huang_xjtu@163.com (P.H)

Affiliation Department of Obstetrics and Gynecology, The First Affiliated Hospital of Xi'an Jiaotong University College of Medicine, Xi'an, ShaanXi, Peoples' Republic of China

Lu Zong

Affiliation Department of Obstetrics and Gynecology, The First Affiliated Hospital of Xi'an Jiaotong University College of Medicine, Xi'an, ShaanXi, Peoples' Republic of China

Meili Pei

Affiliation Department of Obstetrics and Gynecology, The First Affiliated Hospital of Xi'an Jiaotong University College of Medicine, Xi'an, ShaanXi, Peoples' Republic of China

Qingyang Lu

Affiliation Department of Pathology, Liaocheng People's Hospital, Liaocheng, ShanDong, Peoples' Republic of China

Pu Huang

ljwangdr@gmail.com (L.J.W); pu_huang_xjtu@163.com (P.H)

Affiliation Department of Obstetrics and Gynecology, The First Affiliated Hospital of Xi'an Jiaotong University College of Medicine, Xi'an, ShaanXi, Peoples' Republic of China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: LJW PH. Performed the experiments: YM LZ MLP QYL. Analyzed the data: YM LJW PH. Contributed reagents/materials/analysis tools: MLP QYL PH. Wrote the paper: YM LJW PH.