title: Commentary: searching for trials for systematic reviews: what difference does it make?
authors.affiliation: UK Cochrane Centre, NHS R&D Programme, Summertown Pavilion, Middle Way Oxford OX2 7LG, UK. mclarke@cochrane.co.uk
authors.forename: Mike
authors.initials: M
authors.lastname: Clarke
mesh_terms: D016206:Databases, Bibliographic; D019317:Evidence-Based Medicine; D006801:Humans; D007802:Language; D015201:Meta-Analysis as Topic; D017594:Publication Bias; D016032:Randomized Controlled Trials as Topic; D012196:Review Literature as Topic