Antibiotic Exposure and Other Risk Factors for Antimicrobial Resistance in Nasal Commensal Staphylococcus aureus: An Ecological Study in 8 European Countries. oleh Evelien M E van Bijnen, John Paget, Elly S M de Lange-de Klerk, Casper D J den Heijer, Ann Versporten, Ellen E Stobberingh, Herman Goossens, François G Schellevis, collaboration with the APRES Study Team