title: Bicycle helmets: effective protection.
authors: P
authors: P
authors: Parkin
authors: X
authors: X
authors: Hu
authors: L
authors: L
authors: Spence
authors: D
authors: D
authors: Wesson
mesh_terms: D001642:Bicycling; D006259:Craniocerebral Trauma / Q000517:prevention & control; D004867:Equipment Design; D006260:Head Protective Devices; D006688:Hockey; D006801:Humans