Funding for this research was provided by:
National Natural Science Foundation of China (81370468, 81671386)
Received: 15 May 2019
Accepted: 18 October 2019
First Online: 14 November 2019
Ethics approval and consent to participate
: The collection of hospital database in the First People’s Hospital of Jiangxia District for this study was approved by the Medical Ethics Committee of the First People’s Hospital of Jiangxia District and complied with the Declaration of Helsinki. We verbally informed the participants that the data will be used anonymously for medical study. No informed consent was required because the study is observational and the data are anonymized.
: Written informed consent for publication was obtained from all participants.
: The authors declare that they have no competing interests.