Funding for this research was provided by:
National Natural Science Foundation of China (81600357)
the New Xiangya Talent Project of the Third Xiangya hospital of Central South University (JY201714)
Article History
Received: 12 April 2017
Accepted: 24 April 2018
First Online: 4 May 2018
Ethics approval and consent to participate
: This study was conducted according to the principles expressed in the Declaration of Helsinki and was approved by the Ethics Committee of the Third Xiangya Hospital, and the consent form was signed by each participant.
: The authors declare that they have no competing interests.
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