1 Department of Clinical Sciences, Institute of Tropical Medicine, 2000 Antwerp, Belgium; Laboratory of Medical Microbiology, University of Antwerp, Antwerp, Belgium. Electronic address: cvandijck@itg.be.
2 Department of Clinical Sciences, Institute of Tropical Medicine, 2000 Antwerp, Belgium.
3 Department of Clinical Sciences, Institute of Tropical Medicine, 2000 Antwerp, Belgium; Division of Infectious Diseases and HIV Medicine, University of Cape Town, Cape Town, South Africa.