Funding for this research was provided by:
China Medical Board (CMB-15-243)
China Scholarship Council (201406010275)
Text and Data Mining valid from 2018-12-01
Received: 11 May 2018
Accepted: 6 December 2018
First Online: 19 December 2018
Ethics approval and consent to participate
: The study was approved by the Institutional Review Board in Peking University Health Science Center, China (Dnr: IRB0001052–17005). This manuscript does not involve the use of any animal or human data and not applicable for consent to participate.
: Not applicable.
: The authors declare that they have no competing interests.