Authors: Paul Talman; Thi Duong; Steve Vucic; Susan Mathers; Svetha Venkatesh; Robert Henderson; Dominic Rowe; David Schultz; Robert Edis; Merrilee Needham; Richard Macdonnell; Pamela McCombe; Carol Birks; Matthew Kiernan Journal: BMJ Open Date: 2016-09-30 Impact factor: 2.692