Funding for this research was provided by:
Sponsorship, article processing charges and the open access fee for this study were funded by Ipsen
Text and Data Mining valid from 2018-12-01
Received: 5 February 2018
Accepted: 5 December 2018
First Online: 22 December 2018
Ethics approval and consent to participate
: The study was approved by Ethics Committee of Peking University First Hospital (2011), and the written consent was obtained from participants.
: Not applicable.
: The authors declare that they have no competing interests.
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