Funding for this research was provided by:
University of KwaZulu-Natal. (Competetive Research Grant)
National Natural Science Foundation of China (11601053, 11526042)
National Natural Science Foundation of China (11371384, 11571062)
Inyuvesi Yakwazulu-Natali (Competetive Research Grant)
Article History
Received: 6 November 2018
Accepted: 2 December 2019
First Online: 19 December 2019