Funding for this research was provided by:
Program of Yunling Scholarship (NA)
CAS "Light of West China" Program (NA)
Youth Innovation Promotion Association CAS (2013252)
Applied Basic Research Foundation of Yunnan Province (2017FB137)
Article History
Received: 26 November 2018
Accepted: 6 January 2019
First Online: 16 January 2019
Compliance with Ethical Standards
:
: These authors have no conflict of interest to declare.