Funding for this research was provided by:
the Foundation of the CAMS Initiative for Innovative Medicin ((grant no. 2016-I2M-1-19))
Text and Data Mining valid from 2018-03-22
Received: 17 October 2017
Accepted: 12 March 2018
First Online: 22 March 2018
Ethics approval and consent to participate
: All participants were informed of the study aims, and written informed consent was received from each participant before sample collection.The study protocol was approved by the Institutional Ethics Committee (Institute of Medical Biology, Chinese Academy of Medical Sciences, and Peking Union Medical College) and was in accordance with the Declaration of Helsinki for Human Research of 1974 (last modified in 2000).
: Not applicable.
: The authors declare that they have no competing interests.
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