title: Single vs. double data entry.
authors.forename: Gisela
authors.initials: G
authors.lastname: Büchele
authors.forename: Birgit
authors.initials: B
authors.lastname: Och
authors.forename: Gabriele
authors.initials: G
authors.lastname: Bolte
authors.forename: Stephan K
authors.initials: SK
authors.lastname: Weiland
mesh_terms: D003625:Data Collection / Q000379:methods / Q000592:standards; D019992:Databases as Topic / Q000458:organization & administration / Q000592:standards* / Q000706:statistics & numerical data; D006801:Humans; D012107:Research Design / Q000592:standards