Funding for this research was provided by:
Shanghai Sailing Program (17YF1415700)
Shanghai Municipal Commission of Health and Family Planning (2017BR043)
Hospital Development Center (16CR2022A)
Text and Data Mining valid from 2019-05-22
Received: 15 December 2018
Accepted: 8 May 2019
First Online: 22 May 2019
Ethics approval and consent to participate
: Ethics approval was obtained by the Ethics Committee of Ren Ji hospital and written informed consent for participation in the study was obtained from participants. Research was in compliance with the Declaration of Helsinki (ExternalRef removed).
: Not applicable
: The authors declare that they have no competing interests.
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