Chen, Gang http://orcid.org/0000-0002-4849-2257
Monk, Peter http://orcid.org/0000-0002-6539-5897
Zhang, Yangwen http://orcid.org/0000-0002-4352-183X
Funding for this research was provided by:
National natural science Foundation of China (11801063)
China Postdoctoral Science Foundation (2018M633339)
US National Science Foundation (DMS-1619904, DMS-1619904)
Article History
Received: 4 November 2018
Revised: 9 February 2019
Accepted: 17 March 2019
First Online: 3 April 2019