Liu, Tingting
Cheng, Guang
Kang, Xiaowei
Xi, Yibin
Zhu, Yuanqiang
Wang, Kai
Sun, Chao
Ye, Jing
Li, Ping
Yin, Hong
Funding for this research was provided by:
National Natural Science Foundation of China (81372457)
Article History
Received: 13 February 2018
Accepted: 2 April 2018
First Online: 18 May 2018
Compliance with ethical standards
:
: This study was funded by the National Natural Science Foundation of China (No. 81372457).
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. For this type of study formal consent is not required.
: For this type of retrospective study formal consent is not required.