About the Authors

Rui Ma

Contributed equally to this work with: Rui Ma, Xuegang Dai

Roles Methodology, Writing – original draft, Writing – review & editing

Affiliation Information Center, Gansu Provincial Maternity and Child care Hospital (GansuProvincial Central Hospital), Gansu, China

Xuegang Dai

Contributed equally to this work with: Rui Ma, Xuegang Dai

Roles Conceptualization, Investigation, Project administration, Supervision

Affiliation Information Center, Gansu Provincial Maternity and Child care Hospital (GansuProvincial Central Hospital), Gansu, China

Zuochao Yang

Roles Data curation, Formal analysis

Affiliation Information Center, Gansu Provincial Maternity and Child care Hospital (GansuProvincial Central Hospital), Gansu, China

Zhixiong Wei

Roles Data curation, Formal analysis, Visualization

Affiliation Information Center, Gansu Provincial Maternity and Child care Hospital (GansuProvincial Central Hospital), Gansu, China

Bin Zhang

Roles Project administration

1353660050@qq.com

Affiliation Information Center, Gansu Provincial Maternity and Child care Hospital (GansuProvincial Central Hospital), Gansu, China

Competing Interests

The authors have declared that no competing interests exist.