1. Department of Surgery, University of the Witwatersrand, Johannesburg, South Africa
2. Department of Surgery, University of KwaZulu Natal, Durban, South Africa
3. Department of Surgery, Auckland City Hospital, Auckland, New Zealand
4. Department of Surgery, University of Auckland, Auckland, New Zealand
5. Department of Psychiatry, Waikato Hospital, Hamilton, New Zealand
6. Department of Surgery, Waikato Hospital, Hamilton, New Zealand