RT Journal Article SR Electronic T1 Correction: 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 JF BMJ Open JO BMJ Open FD British Medical Journal Publishing Group SP e027845corr1 DO 10.1136/bmjopen-2018-027845corr1 VO 9 IS 11 YR 2019 UL http://bmjopen.bmj.com/content/9/11/e027845corr1.abstract AB