Public health Original research Evaluating the impact of cycle helmet use on severe traumatic brain injury and death in a national cohort of over 11000 pedal cyclists: a retrospective study from the NHS England Trauma Audit and Research Network dataset Nick Dodds1, Rowena Johnson1, Benjamin Walton1, Omar Bouamra2, David Yates2, Fiona Elizabeth Lecky3,4, Julian Thompson1 1 North Bristol NHS Trust, Westbury on Trym, Bristol, UK 2 Institute of Population Health, Trauma Audit and Research...