Funding for this research was provided by:
National Natural Science Foundation of China (No. 81402056 and 81472362)
Received: 29 January 2019
Accepted: 14 March 2019
First Online: 16 April 2019
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of Nanjing Medical University and written informed consent was obtained from all patients.
: We have obtained consents to publish this paper from all the participants.
: The authors declare that they have no competing interest.
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