Funding for this research was provided by:
National Natural Science Foundation of China (81572168, 81501905, 81501933)
Received: 15 December 2017
Accepted: 30 January 2018
First Online: 12 February 2018
Ethics approval and consent to participate
: This study was approved by the IRB (institutional review board) of the Ninth People’s Hospital, Shanghai Jiaotong University School of Medicine, and informed consent was obtained from every participant.
: Not applicable.
: The authors declare that they have no competing interests.
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