Chen, L.
Shen, J.
Shan, X.
Wang, F.
Kan, T.
Tang, X.
Zhao, X.
Qin, Y.
Article History
Received: 4 September 2016
Revised: 13 May 2017
Accepted: 16 June 2017
First Online: 19 July 2017
Compliance with ethical guidelines
:
: L. Chen, J. Shen, X.-H. Shan, F.-Y. Wang, T. Kan, X.-C. Tang, X.-X. Zhao, and Y.-W. Qin declare that they have no competing interests.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the Second Military Medical University ethics committee (Shanghai, China) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.