Session 16 (Bonn, 7-8 March 2023)	16	2023-03-07
Session 17 (Aachen, 15 June 2023)	17	2023-06-15
Session 18 (Web conference, 11 July 2023)	18	2023-07-11
Session 19 (Web conference, 4 October 2023)	19	2023-10-04
Session 20 (Web conference, 7 December 2023)	20	2023-12-07