Funding for this research was provided by:
Natural Science Foundation of China (81573003)
Joint Foundation of Zhejiang Natural Science Foundation-Zhejiang Society for Mathematical Medicine (LSY19H160005)
Article History
Received: 9 December 2019
Accepted: 22 January 2020
First Online: 21 March 2020
Compliance with ethical standards
:
: The data and materials in the current study are available from the corresponding author on reasonable request.
: The authors declare that they have no conflicts of interest.