1. Paediatric Colorectal and Pelvic Reconstruction Centre, Department of Paediatric Surgery, Chris Hani Baragwanath Academic Hospital, University of the Witwatersrand,
South Africa
2. Department of Anatomical Pathology, University of the Witwatersrand,
South Africa
3. Chris Hani Baragwanath Laboratory, National Health Laboratory Services,
South Africa