Declarations
Funding: This study was funded by Chinese national key clinical specialty construction programs and the natural science foundation of Fujian province, China (Grant No. 2017Y91030022), and Startup Fund for scientific research, Fujian Medical University (Grant number: 2017XQ1035).
Conflict of Interest: All authors declare that they have no conflict of interest.
Informed consent: Informed consent was obtained from all individual participants included in the study.