First
Symposium, held in Aachen, Germany, on June 23-25, 2003
Second
Symposium, held in Nice, France, on July 8-10, 2004
Third
Symposium, held in Vienna, Austria, on July 4-6, 2005
Fourth
Symposium, held in Cagliari, Italy, on June 26-28, 2006
Fifth
Symposium, held in Barcelona, Spain, on July 4-6, 2007
Sixth
Symposium, held in Copenhagen, Denmark, on July 2-4, 2008