Authors: Allison M Bourne; Renea V Johnston; Sheila Cyril; Andrew M Briggs; Ornella Clavisi; Gustavo Duque; Ian A Harris; Catherine Hill; Claire Hiller; Steven J Kamper; Jane Latimer; Andrew Lawson; Chung-Wei Christine Lin; Christopher Maher; Diana Perriman; Bethan L Richards; Peter Smitham; William John Taylor; Sam Whittle; Rachelle Buchbinder Journal: BMJ Open Date: 2018-12-16 Impact factor: 2.692