Received: 30 November 2017
Accepted: 15 March 2018
First Online: 27 March 2018
Ethics approval and consent to participate
: This study was performed according to the Declaration of Helsinki and approved by the institutional review boards of Nanjing Drum Tower Hospital (NJDTH20160810). All patients consented to participate in the research, and oral/written informed consent was obtained from each patient.
: We have obtained consent to publish from each patient.
: The authors declare that they have no competing interests.
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