Funding for this research was provided by:
the national natural science foundation of China (81301573)
Chongqing Science and Technology Commission (cstc2013jcyjA10090)
Chongqing Science and Technology Commission (2017MSXM031)
Received: 13 August 2019
Accepted: 31 December 2019
First Online: 9 January 2020
Ethics approval and consent to participate
: Ethics approval for this study was obtained from the Second Affiliated Hospital of Chongqing Medical University. Written informed consent was obtained for all involved participants.
: Not Applicable.
: All the authors have no conflict of interest to declare. No competing financial interests exist.