title: We cannot ignore bias, especially if effects are small, but we need better methods for evaluating prevention systems.
authors.affiliation: Oxford Brookes University, Oxford, UK. david.foxcroft@brookes.ac.uk.
authors.forename: David R
authors.initials: DR
authors.lastname: Foxcroft
mesh_terms: D015982:Bias; D006801:Humans; D062405:Motivational Interviewing
keywords: Alcohol; brief interventions; motivational interviewing; systematic review