title: The healthy donor effect: a matter of selection bias and confounding.
authors.affiliation: Department Donor Studies, Sanquin Research, Nijmegen, the Netherlands. f.atsma@sanquin.nl
authors.forename: Femke
authors.initials: F
authors.lastname: Atsma
authors.forename: Femmie
authors.initials: F
authors.lastname: de Vegt
mesh_terms: D001782:Blood Donors / Q000706:statistics & numerical data*; D015986:Confounding Factors, Epidemiologic; D006801:Humans; D015983:Selection Bias