About the Authors

Xiu Yun Wu

Roles Conceptualization, Formal analysis, Methodology, Supervision, Writing – original draft, Writing – review & editing

xiuyunwu777@yahoo.com

Affiliation School of Public Health and Management, Weifang Medical University, Weifang City, Shandong, China

Li Hui Han

Roles Data curation, Writing – review & editing

Affiliation Affiliated Second Hospital of Weihai City, Faculty of Medicine, Qingdao University, Weihai City, Shandong, China

Jian Hua Zhang

Roles Writing – review & editing

Affiliation School of Public Health and Management, Weifang Medical University, Weifang City, Shandong, China

Sheng Luo

Roles Writing – review & editing

Affiliation School of Public Health and Management, Weifang Medical University, Weifang City, Shandong, China

Jin Wei Hu

Roles Writing – review & editing

Affiliation School of Public Health and Management, Weifang Medical University, Weifang City, Shandong, China

Kui Sun

Roles Writing – review & editing

Affiliation School of Public Health and Management, Weifang Medical University, Weifang City, Shandong, China

Competing Interests

The authors have declared that no competing interests exist.