Funding for this research was provided by:
Clinical Key Grants of Southwest Hospital (SWH2016ZDCX3029, SWH2016YSCXYB-09)
National Natural Science Foundation (31071202)
Article History
Received: 19 December 2018
Accepted: 23 February 2019
First Online: 1 March 2019
Compliance with ethical standards
:
: The authors declare no conflict of interest.
: Informed consent was obtained from all the 31 patients. The study was approved by the Ethics Committee of Southwest Hospital and was in accordance with the Helsinki Declaration.