Vanessa Selak1, Jamie-Lee Rahiri2, Rod Jackson3, Matire Harwood4. 1. Senior Lecturer, Epidemiology and Biostatistics, University of Auckland, Auckland. 2. Fellow in Medical Education, Department of Surgery, University of Auckland, Auckland. 3. Professor, Epidemiology and Biostatistics, University of Auckland, Auckland. 4. Associate Professor, General Practice and Primary Healthcare, University of Auckland, Auckland.