title: Playing hard to get: field substitutions in health surveys.
authors.affiliation: Epidemiology Unit, Scientific Institute of Public Health, Brussels, Belgium. stefaan.demarest@iph.fgov.be
authors.forename: Stefaan
authors.initials: S
authors.lastname: Demarest
authors.forename: Lydia
authors.initials: L
authors.lastname: Gisle
authors.forename: Johan
authors.initials: J
authors.lastname: Van der Heyden
mesh_terms: D001530:Belgium; D006306:Health Surveys; D006801:Humans; D007407:Interviews as Topic; D016015:Logistic Models