Eur. Phys. J. E, 39 6 (2016) 64
Published online: 27 June 2016
Holger Stark, Markus Baer, Carsten Beta, Sabine Klapp and Andreas Knorr
On behalf of all co-authors, I wish to express to you and to the referees our deep gratitude for the time and careful work spent on our manuscript.