2 Department of Surgical Sciences, Nelson R Mandela School of Clinical Medicine, Univeristy of KwaZulu-Natal, Congella, Durban, KwaZulu-Natal, RSA.
3 Department of Surgical Sciences, Nelson R Mandela School of Clinical Medicine, Univeristy of KwaZulu-Natal, Congella, Durban, KwaZulu-Natal, RSA. hardcastle@ukzn.ac.za.
4 Inkosi Albert Luthuli Central Hospital, Mayville, Durban, KwaZulu-Natal, RSA. hardcastle@ukzn.ac.za.