Donovan, M. M.
Kong, V. Y.
Bruce, J. L.
Laing, G. L.
Bekker, W.
Manchev, V.
Smith, M.
Clarke, D. L.
Article History
First Online: 18 December 2018
Compliance with ethical standards
:
: All authors declare that they have no conflicts of interest
: Ethics approval for this study and for maintenance of the registry was formally endorsed by the Biomedical Research Ethics Committee (BREC) of the University of Kwa-Zulu Natal (reference: BE 207/09).