Liu, Chao
Guo, Jun
Funding for this research was provided by:
China Postdoctoral Science Foundation (2014M562610)
Excellent Young Program of the Organization Department of Beijing Municipal Party Committee (2016000057592G258)
Article History
Received: 14 March 2018
Accepted: 26 June 2018
First Online: 3 August 2018
Ethics approval and consent to participate
: Informed consent was not needed due to the retrospective nature of the study. The study was approved by the Chinese PLA General Hospital Ethics Committee, and the Guidelines for Human Experimentation (PR. China) were followed throughout.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.