Lin, Dongxin
Fan, Dazhi
Wu, Shuzhen
Chen, Gengdong
Li, Pengsheng
Ma, Huiting
Ye, Shaoxin
Rao, Jiaming
Zhang, Huishan
Zeng, Meng
Liu, Yan
Guo, Xiaoling
Liu, Zhengping http://orcid.org/0000-0002-4964-0258
Article History
Received: 26 March 2019
Accepted: 15 July 2019
First Online: 24 July 2019
Ethics approval and consent to participate
: This study was approved by the ethics committee of Southern Medical University Affiliated Maternal & Child Health Hospital of Foshan (ethics approval number: FSFY-20180903). Due to the respective nature of current study, the consent from each subject were waived. Nevertheless, the private information was well protected during the study.
: Not applicable.
: The authors declare that they have no competing interest.