Funding for this research was provided by:
National Natural Science Foundation of China (31571292)
Startup Fund for Scientific Research, Fujian Medical University (2017XQ1089)
Text and Data Mining valid from 2019-01-28
Received: 21 September 2018
Accepted: 15 January 2019
First Online: 28 January 2019
Ethics approval and consent to participate
: The study was conducted in accordance with the Ethics Committee of the First Affiliated Hospital of Fujian Medical University and the 1964 Helsinki Declaration. Informed consent was obtained from all participants included in the study.
: Not applicable
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.