1. Institute of Cell Biology, Histology and Embryology, Center for Molecular Medicine (ZMM), Medical University of Graz, Austria
2. Core Facility Ultrastructure Analysis, Center for Medical Research (ZMF), Medical University of Graz, Austria
3. Department of Cell and Molecular Biology, Karolinska Institutet, Stockholm, Sweden
4. Center for Anatomy and Cell Biology, Department of Cell Biology and Ultrastructure Research, Medical University of Vienna, Austria
5. Institute of Neuroscience and School of Biology, University of Newcastle upon Tyne, UK
6. Department of Neuroscience, Linné Center of Excellence in Developmental Biology and Regenerative Medicine (DBRM), Karolinska Institutet, Stockholm, Sweden