Funding for this research was provided by:
National Natural Science Foundation of China (#81301400/H1901)
Article History
Received: 7 February 2018
Accepted: 20 April 2018
First Online: 13 June 2018
Compliance with ethical standards
:
: The Ethics Committee of West China Hospital of Sichuan University approved this study. All procedures performed in studies involving human participants were in accordance with 1964 Helsinki declaration and its later amendments.
: The authors declare that they have no competing interests