title: Helmets for motor-cyclists: are there any medical grounds for exemption?
authors.forename: G
authors.initials: G
authors.lastname: Trinca
authors.forename: D A
authors.initials: DA
authors.lastname: Simpson
mesh_terms: D001315:Australia; D006259:Craniocerebral Trauma / Q000517:prevention & control*; D006260:Head Protective Devices / Q000592:standards*; D006801:Humans; D009049:Motorcycles; D011482:Protective Devices / Q000592:standards*