Ethics approval and consent to participate
This retrospective study was approved by the Ethics Committee of the Nanfang Hospital of Southern Medical University (approval number NFEC-2017-135 and clinical trial number CHiCTR1800017778; International Clinical Trials Registry Platform Search Port, http://apps.who.int/trialsearch/); registration date: August 14, 2018. Written consent to participate in the study was provided by all patients.
Consent for publication
Not Applicable.
Availability of data and material
The datasets used and/or analysed during the current study are available from the corresponding author upon reasonable request.
Competing interests
The authors declare that they have no competing interests to disclose.
Funding
The National Science and Technology Support Program of China (2014BAI05B03)
The Natural Science Foundation of Guangdong Province(2015A030311024)
The Science and Technology Plan of Guangzhou (158100075)
The above funding sources provided financial assistance that had an important role in data collection.
Authors' contributions
- Pengfei Li did the literature search, data collection, data analysis and interpretation, drafted and revised the manuscript
- Shan Kang conceived and designed the study, interpreted the data, developed and revised the manuscript.
- Jianxin Guo conceived and designed the study, interpreted the data, developed and revised the manuscript.
- Shiqi Liang did the literature search, data analysis and interpretation and figures, drafted and revised the manuscript.
- Ying Yang conceived, designed the study, interpreted the data. conceived, designed the study, interpreted the data.
- Shaoguang Wang conceived, designed the study, interpreted the data.
- Xiaonong Bin did the data analysis and interpretation.
- Jinghe Lang conceived, designed and supervised the study.
- Ping Liu conceived, designed and supervised the study.
- Chunlin Chen conceived, designed and supervised the study.
All authors read and approved the final manuscript.
Acknowledgements
This study received funding of the National Science and Technology Support Program of China (2014BAI05B03), the National Natural Science Fund of Guangdong (2015A030311024), the Science and Technology Plan of Guangzhou (158100075). We thank Min Hao (The second hospital of ShanXi medical university), Bin Ling (China-Japan Friendship Hospital), Lixin Sun and Hongwei Zhao (Shanxi Cancer Hospital), Jihong Liu and Lizhi Liang (Sun Yat-sen University Cancer Center), Lihong Lin and Yu Guo (Anyang Tumor Hospital ), Li Wang (The Affiliated Tumor Hospital of Zhengzhou University), Weidong Zhao (Anhui Provincial Cancer Hospital), Yan Ni (The Yuncheng central hospital of Shanxi province), Wentong Liang and Donglin Li (Guizhou Provincial People`s Hospital), Xuemei Zhan and Mingwei Li (Jiangmen Central Hospital), Weifeng Zhang (Ningbo Women & Children's Hospital), Peiyan Du (The Affiliated Cancer Hospital and Institute of Guangzhou Medical University), Ziyu Fang (Liuzhou workers' hospital), Rui Yang (Shenzhen hospital of Peking University), Long Chen (Qingdao Municipal Hospital), Encheng Dai and Ruilei Liu (Linyi People's Hospital), Yuanli He and Mubiao Liu (Zhujiang Hospital, Southern Medical University), Jilong Yao and Zhihua Liu (Shenzhen Maternity & Child Health Hospital), Xueqin Wang (The Fifth Affiliated Hospital of Southern Medical University), Anwei Lu (Maternal and Child Health Hospital of Guiyang Province), Shuangling Jin (Peace Hospital affiliated to Changzhi Medical College), Ben Ma (Guangzhou First People's Hospital), Zhonghai Wang (Shenzhen Nanshan People's Hospital), Lin Zhu (The Second Hospital of Shandong University), Hongxin Pan (The Third Affiliated Hospital of Shenzhen University), Qianyong Zhu (No.153. Center Hospital of Liberation Army /Hospital No.988 of the Chinese People's Liberation Army Joint Support Force), Dingyuan Zeng and Zhong Lin (Maternal and Child Health Care Hospital of Liuzhou) , Xiaohong Wang (Laiwu People's Hospital/Jinan City People's Hospital) and Bin Zhu (The Affiliated Yiwu Women and Children Hospital of Hangzhou Medical College) for their contribution in data collection.
Authors' information (optional)
Corresponding author
1 Chunlin Chen, PhD
Department of Obstetrics and Gynecology, Nanfang Hospital, Southern Medical University, No. 1838 Guangzhou Avenue, Guangzhou 510515, China. E-mail address: [email protected]. Tel: +86 02062787562. ORCID:0000-0002-1708-3047
2 Ping Liu MD/PhD
Department of Obstetrics and Gynecology, Nanfang Hospital, Southern Medical University, No. 1838, Guangzhou Avenue, Guangzhou 510515, China. E-mail address: [email protected]. Tel: +86 02087705641.
Contributed equally to this work
1 Pengfei Li,MD/PhD
Department of Obstetrics and Gynecology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China, Email: [email protected]
2 Shan Kang,MD/PhD
Department of Gynecology , Fourth Hospital,Hebei Medical University,Shijiazhuang 050019, China, Email: [email protected]
3 Jianxin Guo,MD/PhD
Department of Obstetrics and Gynecology,Daping hospital, Army Medical University, Chongqing, 400042,China, Email: [email protected]
4 Shiqi Liang,MD
Department of Obstetrics and Gynecology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China, Email: [email protected]
Other authors
Ying Yang,MD/PhD
Department of Obstetrics and Gynecology,Xinqiao Hospital,Army Medical University, Chongqing 400037, China, Email: [email protected]
Shaoguang Wang,MD/PhD
Department of Gynecology, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai 264000, China, Email: [email protected]
Xiaonong Bin, BA
Department of Epidemiology, College of Public Health, Guangzhou Medical University, Email: [email protected]
Jinghe Lang, MD/PhD
1 Department of Obstetrics and Gynecology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
2 Department of Obstetrics and Gynecology, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, China.
Email: [email protected]