Funding for this research was provided by:
National Natural Science Foundation of China (81460569)
Article History
First Online: 20 September 2019
Compliance with Ethical Standards
:
: This work was supported by The National Natural Science Foundation of China under grant no. 81460569.
: Zhang Ren, Chen Ming, Lu Jiejiu, Lv Chunle and Liu Taotao have no conflicts of interest.
: All procedures in this study were conducted in accordance with the 1964 Helsinki Declaration (and its amendments) and the guidelines of the ethics committee or institutional review board that approved the study.
: Written informed consent was obtained from all patients.