Funding for this research was provided by:
Scientific Research Fund of Army of China.
Received: 10 March 2019
Accepted: 24 June 2019
First Online: 16 July 2019
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of the Chinese People’s Liberation Army General Hospital. All patients signed informed consent form.
: Not applicable.
: The authors declare that they have no competing interests.