title: Case-control studies: part 2.
authors.affiliation: Bern, Switzerland, and Corfu, Greece.
authors.forename: Nikolaos
authors.initials: N
authors.lastname: Pandis
mesh_terms: D015982:Bias; D016022:Case-Control Studies; D035061:Control Groups; D018865:Dental Research / Q000706:statistics & numerical data; D006801:Humans; D015588:Observer Variation; D012107:Research Design / Q000706:statistics & numerical data