Funding for this research was provided by:
National Natural Science Foundation of China (81101305)
the National Key Technologies R&D Program for the 12th Five-Year Plan (grant 2012ZX10001003-001)
the National Science and Technology Support Program (2014 BAI07B06)
Text and Data Mining valid from 2019-03-14
Received: 15 October 2018
Accepted: 22 February 2019
First Online: 14 March 2019
Ethics approval and consent to participate
: The Ethic Committee of Peking Union Medical College Hospital approved this study and all the participant provided written informed consent.
: 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.