Kerri Keet1, Geney Gunston2, Rachel Alexander3. 1. Division of Clinical Anatomy, Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa. kkeet@sun.ac.za. 2. Division of Clinical Anatomy and Biological Anthropology, Department of Human Biology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa. 3. School of Medical and Health Sciences, Edith Cowan University, Perth, WA, Australia.