Session 1 (Paris, 27-28 February 2017) 1 2017-02-27
Session 2 (Paris, 28-29 March 2017) 2 2017-03-28
Session 4 (Berlin, 21-23 November 2017) 4 2017-11-21
Session 3 (Web conference, 7 September 2017) 3 2017-09-07