1. Department of Anatomical Pathology; Faculty of Health Sciences, University of the Witwatersrand and National Health Laboratory Service; Johannesburg South Africa
2. Department of Anatomical Pathology; St Vincent's Hospital, and Notre Dame University Medical School; Sydney Australia
3. Division of Anatomical Pathology; Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town and National Health Laboratory Service; Port Elizabeth South Africa