1. Department of Psychology University of York UK
2. Laboratory for Cognitive Investigations and Behavioural Genetics Tomsk State University Russia
3. MRC Social Genetic & Developmental Psychiatry Centre Institute of Psychiatry King's College London UK
4. Department of Psychology University of Warwick UK
5. UCL Genetics Institute Department of Genetics Evolution and Environment University College London UK
6. Department of Human Development and Family Science Ohio State University USA
7. Department of Speech and Hearing Sciences University of New Mexico USA
8. Department of Psychology Goldsmith's College London UK