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Piesche M, Hildebrandt Y, Chapuy B, Wulf GG, Trümper L, Schroers R.Piesche M, et al. Among authors: wulf gg.Vaccine. 2009 Jul 23;27(34):4718-23. doi: 10.1016/j.vaccine.2009.05.010. Epub 2009 May 27.Vaccine. 2009.PMID: 19446593