title: Position on the moped, risk of head injury and helmet use: an example of confounding effect.
authors.forename: Pablo
authors.initials: P
authors.lastname: Lardelli-Claret
authors.forename: Juan de Dios
authors.initials: Jde D
authors.lastname: Luna-del-Castillo
authors.forename: José Juan
authors.initials: JJ
authors.lastname: Jiménez-Moleón
mesh_terms: D000063:Accidents, Traffic; D015986:Confounding Factors, Epidemiologic; D006259:Craniocerebral Trauma / Q000209:etiology*; D006260:Head Protective Devices; D006801:Humans; D009049:Motorcycles; D012307:Risk Factors