Zhang, Lei
Tao, Jianling
Wen, Yubing
Li, Li
Wu, Xueyi
Li, Xuewang
Li, Xuemei
Funding for this research was provided by:
National Natural Science Foundation of China (81170665)
Article History
Received: 24 August 2016
Accepted: 6 February 2017
First Online: 17 February 2017
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in the study involving human participants were in accordance with the ethical standards of the Ethics Committee of Peking Union Medical College Hospital and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.