1. Center for Human Genetics, K.U. Leuven, Leuven, Belgium
2. Department of Molecular and Developmental Genetics, VIB, Leuven, Belgium
3. Helmholtz Center Munich, Technical University Munich, Institute of Developmental Genetics, Max‐Planck Institute of Psychiatry, Munich, Germany
4. Department of Pediatrics, Division of Neurology and Metabolism, Ghent University Hospital, Ghent, Belgium
5. Dulbecco‐Telethon Institute, Venetian Institute of Molecular Medicine, Padova, Italy
6. Department of Cell Physiology and Metabolism, University of Geneva, Geneva, Switzerland