Session 1 (Essen, 15-16 May 2013) 1 2013-05-15
Session 2 (Bonn, 25 June 2013) 2 2013-06-25
Session 3 (Bologna, 25-26 September 2013) 3 2013-09-25
Session 4 (Bologna, 5-6 February 2014) 4 2014-02-05
Session 5 (Geneva, 26 May 2015) 5 2015-05-26