1. Embryonic Self-Organization Research Group, Max Planck Institute for Molecular Biomedicine, Röntgenstraße 20, 48149 Münster, Germany.
2. Transgenic Facility, Max Planck Institute for Molecular Biomedicine, Röntgenstraße 20, 48149 Münster, Germany.
3. Electron Microscopy Facility, Max Planck Institute for Molecular Biomedicine, Röntgenstraße 20, 48149 Münster, Germany.
4. Thermo Fisher Scientific, Achtseweg Noord 5, 5651 GG Eindhoven, Netherlands.
5. Flow Cytometry Unit, Max Planck Institute for Molecular Biomedicine, Röntgenstraße 20, 48149 Münster, Germany.