title: A note regarding 'random effects'.
authors.affiliation: Competence Center for Methodology and Statistics, CRP Santé, Strassen, Luxembourg.
authors.forename: Stephen
authors.initials: S
authors.lastname: Senn
mesh_terms: D006801:Humans; D015337:Multicenter Studies as Topic / Q000706:statistics & numerical data*; D016032:Randomized Controlled Trials as Topic / Q000706:statistics & numerical data*