title: Invited commentary: screening as a nuisance variable in cancer epidemiology: methodological considerations.
authors.affiliation: Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania School of Medicine, Philadelphia, PA 19104-6021, USA. mjoffe@cceb.upenn.edu
authors.forename: Marshall M
authors.initials: MM
authors.lastname: Joffe
mesh_terms: D015982:Bias; D015986:Confounding Factors, Epidemiologic; D015987:Effect Modifier, Epidemiologic; D004812:Epidemiologic Methods; D006801:Humans; D015994:Incidence; D009369:Neoplasms / Q000175:diagnosis / Q000453:epidemiology* / Q000209:etiology / Q000401:mortality; D011230:Precancerous Conditions / Q000175:diagnosis / Q000453:epidemiology