title: The need to standardize methodology.
authors.affiliation: Technischer Uberwachungs-Verein Hannover, Braunschweig, Germany.
authors.forename: W R
authors.initials: WR
authors.lastname: Nickel
mesh_terms: D000063:Accidents, Traffic / Q000517:prevention & control*; D000437:Alcoholism / Q000534:rehabilitation*; D006801:Humans; D015201:Meta-Analysis as Topic; D012107:Research Design; D016896:Treatment Outcome