Funding for this research was provided by:
Research Grants Council of Hong Kong (PolyU 153277/16P)
Research Grants Council of Hong Kong (PolyU 153277/16P)
Research Grants Council of Hong Kong
NSFC (11601336)
Program for Professor of Special Appointment
National Science Foundation (DMS-1412454)
Centre for Disease Control and Prevention (U01CK000510-01)
Article History
Received: 30 January 2018
Revised: 30 August 2018
First Online: 1 March 2019