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Funding
Funding for this research was provided by:
School of Medicine, Shanghai Jiao Tong University (YG2013MS21)
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Article History
Received: 3 February 2019
Accepted: 1 April 2019
First Online: 11 April 2019
Ethics approval and consent to participate
: This retrospective study was approved by our institutional research ethics board, and informed consent was waived.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
