The new abstract submission deadline is now April 22, 2019, for the 5th International YES Congress 2019, to be held at the Freie Universität in Berlin, Germany from 9 - 13 September 2019.
A full list of sessions and details on abstract submission can be found here: https://yesdeutschland.weebly.com/call-for-abstracts.html
The registration for the conference is now open: https://yesdeutschland.weebly.com/registration.html