Liu, Keqiang
Liu, Yaping
Li, Xue
Xu, Kai-Feng
Tian, Xinlun
Zhang, Xue
Funding for this research was provided by:
the National Natural Science Foundation of China (31271345)
Beijing Municipal Science and Technology Commission (Z151100003915078)
CAMS Innovation Fund for Medical Sciences (2016-I2M-1-002)
Article History
Received: 17 March 2017
Accepted: 7 June 2017
First Online: 15 June 2017
Compliance with ethical standards
:
: The authors declare that they have no competing interest.
: The protocol of this study was approved by the Institutional Review Board committee at PUMCH. Signed informed consents were obtained from all individual participants included in the study.