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27-29 August 2012 in Bremen, Germany
21-23 March 2011 in Montreal, Canada
01-02 May 2010 in Vienna, Austria
05-10 July 2009 in Bremen and Cologne, Germany
08-10 September in Hellwege, Germany
03 November 2009 in Quebec City, Canada
15-19 March 2006 in Rio Gallegos, Argentina