Benjamin Hirt
October 2019
Melanie Ohnemus
September 2019
Michael Muller
February - March 2013
Eleonore Hugendubel
August 2012
Michelle Cotton
2011
May 2009
June 2009
Barbara Buchmaler
September 2009
Andrew Bonacina
2009
Regina Barunke and Lilian Haberer
2008
October 2007
Charles Danby
2007