Lecturer, School of Public Health & Community Medicine, UNSW Australia (The University of New South Wales).

BS (BSc, MPH, PhD) is Associate Professor of Medical Education at UNSW Australia (The University of New South Wales).

RC (MBBS, Dip Paed, FRACGP, MPH) is Director of training, GP Synergy and Adjunct Associate Professor, School of Medicine Sydney, University of Notre Dame, Australia.

NZ (MBBS, FRACGP, MPH, PhD) is Professor of General Practice, School of Public Health & Community Medicine, UNSW Australia (The University of New South Wales).

The contributions of Dr Asela Olupeliyawa to the preliminary theoretical basis are gratefully acknowledged. The contributions of Dr Madawa Chandrathilake and Dr Sisira Dharmaratne to the early exploration of the relevant literature and theoretical aspects are greatly appreciated.

This study is funded through a Vanguard Grant (award ID100260) from the National Heart Foundation of Australia. This is a competitive grant ranked within the highest category (category 1) of research funding in Australia, and is listed on the Australian Competitive Grants Register (ACGR).
