1 Epigenetic Engineering, Institute of Stem Cell Research, Helmholtz Zentrum, German Research Center for Environmental Health, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany; BioMedizinisches Centrum, Ludwig-Maximilian-Universität, Großhaderner Str. 9, 82152 Planegg-Martinsried, Germany. Electronic address: stefan.stricker@helmholtz-muenchen.de.
2 Institute of Psychiatry, Psychology & Neuroscience, Centre for Developmental Neurobiology, King's College London, London SE1 1UL, UK; MRC Centre for Neurodevelopmental Disorders, King's College London, London SE1 1UL, UK; The Francis Crick Institute, London NW1 1AT, UK; Institute of Physiological Chemistry, University Medical Center of the Johannes Gutenberg University Mainz, 55128 Mainz, Germany. Electronic address: benedikt.berninger@kcl.ac.uk.
3 Neural Stem Cells, Institute of Stem Cell Research, Helmholtz Zentrum, German Research Center for Environmental Health, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany; BioMedizinisches Centrum, Ludwig-Maximilian-Universität, Großhaderner Str. 9, 82152 Planegg-Martinsried, Germany; SyNergy, Excellence Cluster Systems Neurology, Biomedizinisches Zentrum, Ludwig-Maximilians Universität, Großhadernerstr.9, 82152 Planegg-Martinsried, Germany. Electronic address: magdalena.goetz@helmholtz-muenchen.de.