Isabel Fernández Carvajal is a Doctor of Medicine working on the genetic basis of intellectual disability at the Instituto de Biologia y Genetica Molecular (IBGM) at the University of Valladolid, Spain. She has a special interest in Fragile X Syndrome, Autistic Spectrum Disorders and other forms of intellectual disability with genetic origin. David Aldridge is co-director of the Nordoff-Robbins Zentrum, Witten, Germany.