title: Risk of bias: Worse than it appears.
authors.affiliation: National Cancer Institute, University of Maryland, Baltimore, MD, USA.|Biometry Research Group, National Cancer Institute, Rockville, MD, USA.
authors.forename: Vance W
authors.initials: VW
authors.lastname: Berger
mesh_terms: D015982:Bias; D006801:Humans; D012306:Risk