Funding for this research was provided by:
Natural Science Foundation of Zhejiang Province (LY15H120001)
National Natural Science Foundation of China (81500766, 81870624)
Received: 3 November 2018
Accepted: 7 February 2019
First Online: 19 February 2019
Ethics approval and consent to participate
: This study has been performed in accordance with the Declaration of Helsinki and was approved by the Ethics Committee of the Second Affiliated Hospital, School of Medicine, Zhejiang University.
: Written informed consents were obtained from all subjects.
: The authors declare that they have no competing interests.
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