Funding for this research was provided by:
National Natural Science Foundation of China (21605035)
Natural Science Foundation of Hebei Province (B2014201162)
IDENTIFIERS
PEER REVIEW METHOD
: Single-blind
PUBLICATION HISTORY
: Received 8 March 2018; Accepted 9 April 2018; Accepted Manuscript published 10 April 2018; Advance Article published 25 April 2018; Version of Record published 10 May 2018