Tian, Xiao-Yin
Liu, Bing
Shi, Hao
Zhao, Zi-Ran
Zhou, Xi-Ping
Zhang, Tao
Sun, Qiu-Ning
Zuo, Ya-Gang
Article History
Received: 27 October 2014
Revised: 10 May 2015
Accepted: 29 June 2015
First Online: 6 August 2015
Compliance with ethical standards
:
: This research was carried out in accordance with the Helsinki Declaration and ethical standards of the committee on human experimentation at Peking Union Medical College Hospital. The requirement for informed consent was waived as this study included only data without information about the identity of the patients.
: The authors declare that they have no conflict of interest.