Funding for this research was provided by:
National Natural Science Foundation of China (21525208)
Shaanxi Normal University
RELATED DATA
IDENTIFIERS
PEER REVIEW METHOD
: Authors can choose between single-blind and double-blind peer review
PUBLICATION HISTORY
: Received 16 April 2019; Accepted 28 May 2019; Accepted Manuscript published 29 May 2019; Advance Article published 6 June 2019; Version of Record published 20 June 2019