Funding for this research was provided by:
National Natural Science Foundation of China (31700942)
China Postdoctoral Science Foundation (2017M622936)
Fundamental Research Funds for the Central Universities (SWU116055)
Postdoctoral Science Foundation of Chongqing (Xm2017066)
Text and Data Mining valid from 2018-01-23
Received: 10 July 2017
Accepted: 4 December 2017
First Online: 23 January 2018
Compliance with ethical standards
: This research was supported by National Natural Science Foundation of China (31700942), China Postdoctoral Science Foundation (2017M622936), Chongqing Postdoctoral Science Foundation (Xm2017066), and Fundamental Research Funds for the Chinese Central Universities (SWU116055) to K. M. in China, and an infrastructure grant of the Netherlands Research organization (NWO) to B. H.
: The authors declared that they had no conflicts of interest with respect to their authorship or the publication of this article.
: All procedures performed in this study were in accordance with the ethical standards of ethics committee in Southwest University and with the 1964 Helsinki declaration and its later amendments.
: Informed consents were obtained from all participants included in this study.