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Westdijk J, Koedam P, Barro M, Steil BP, Collin N, Vedvick TS, Bakker WA, van der Ley P, Kersten G.Westdijk J, et al. Among authors: steil bp.Vaccine. 2013 Feb 18;31(9):1298-304. doi: 10.1016/j.vaccine.2012.12.076. Epub 2013 Jan 9.Vaccine. 2013.PMID: 23313617Free PMC article.