Emre Yaksi1,2,3, Panayiota Poirazi1,4, Ileana Hanganu-Opatz1,5. 1. FENS-Kavli Network of Excellence, Europe-wide. 2. NERF, VIB, KULeuven, Leuven, Belgium. 3. Kavli Institute for Systems Neuroscience, Centre for the Biology of Memory, NTNU, Trondheim, Norway. 4. Institute of Molecular Biology and Biotechnology (IMBB), Foundation for Research and Technology-Hellas (FORTH), Heraklion, Crete, Greece. 5. Institute of Neuroanatomy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.