1. Robert Koch Institute: Estimation of Influenza-associated deaths during the influenza season 2008/09 and the pandemic season 2009/10. Epidemiologisches Bulletin. 2011, 10: 75-77.
2. Robert Koch Institute: Report on the epidemiology of influenza in Germany, season 2010/11. 2011, Available at: http://influenza.rki.de/Saisonberichte/2010.pdf (day of access: 01/02/2012)
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