[1
]
Ampath National Laboratory Services, Milpark Hospital, Johannesburg, South Africa.
[2
]
Division of Infectious Diseases and HIV Medicine, Department of Medicine, University
of Cape Town, Cape Town, South Africa.
[3
]
Department of Quality Leadership, Netcare Hospitals Ltd, Johannesburg, South Africa.
[4
]
Charlotte Maxeke Johannesburg Academic Hospital and Faculty of Health Sciences, University
of the Witwatersrand, Johannesburg, South Africa.