This article has been accepted for publication and has undergone full peer review but has not been through the full structural and scientific editing, typesetting, pagination and proofreading processes which may lead to differences between this version and the Version of Record. Click here for PDF version. Please cite this article as doi: 10.5694/mja2.51318
Publication of your online response is subject to the Medical Journal of Australia's editorial discretion. You will be notified by email within five working days should your response be accepted.