Received: 5 October 2018
Accepted: 11 December 2018
First Online: 5 January 2019
Ethics approval and consent to participate
: The study was approved by the ethical committee of First Affiliated Hospital of Fujian Medical University. All the patients gave written consent to for research applications of their clinical data. The patient data was anonymized in this study.
: Not applicable.
: The authors declare that they have no competing interests.
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