title: A thick opt-out is often sufficient.
authors.affiliation: University Medical Center Utrecht, Julius Center, Department of Medical Humanities, PO Box 85500, Utrecht, 3508 GA, The Netherlands. N.Giesbertz@umcutrecht.nl
authors.forename: Noor A A
authors.initials: NA
authors.lastname: Giesbertz
authors.forename: Annelien L
authors.initials: AL
authors.lastname: Bredenoord
authors.forename: Johannes J M
authors.initials: JJ
authors.lastname: van Delden
mesh_terms: D018070:Biological Specimen Banks / Q000941:ethics*; D035843:Biomedical Research / Q000941:ethics*; D006801:Humans; D007258:Informed Consent / Q000941:ethics*; D026684:Personal Autonomy; D035842:Research Subjects; D015983:Selection Bias