McDonald, ECooper, E2019-11-132019-11-132019-11-082019-11-08The New Zealand medical journal, 132(1505), 79-82.0028-84461175-8716https://hdl.handle.net/10292/13004No abstract.Copyright © New Zealand Medical Association, 2019. All Rights Reserved. Authors retain the right to place his/her publication version of the work on a personal website or institutional repository for non commercial purposes. The definitive version was published in (see Citation). The original publication is available at (see Publisher’s Version). The New Zealand Medical Journal is already largely a free-to-all publication. All items more than 6 months old are freely available to anyone in the world who has internet access.Journal ArticleOpenAccess