Funding for this research was provided by:
Beijing Municipal Science and Technology Commission (Z151100003915078)
Fundamental Research Funds for the Central Universities (2016ZX310177)
CAMS Innovation Fund for Medical Sciences (2016-I2M-1-002)
Text and Data Mining valid from 2018-07-03
Received: 25 February 2018
Accepted: 5 June 2018
First Online: 3 July 2018
Ethics approval and consent to participate
: Informed consent was obtained from all available individuals included in this study and the study was approved by the Ethical Review Board of Peking Union Medical College.
: Not applicable.
: The authors declare that they have no competing interests.
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