1 Immunodeficiency Clinic, Karl Bremer Hospital, Room 12, Outpatient building, Bellville, 7530, South Africa.
2 Infectious Diseases and Medical Microbiology, University of Manitoba, Winnipeg, Canada and Epidemiology for Global Health Institute, University of Antwerp, Antwerp, Belgium.
3 Division of Dermatology, Stellenbosch University, Tygerberg Hospital, Parow, South Africa.
4 Division of Anatomical Pathology, Stellenbosch University and National Health Laboratory Service, Tygerberg Hospital, Parow, South Africa.