1. Warneford Hospital, Department of Psychiatry, University of Oxford, Oxford, United Kingdom
2. Social and Public Policy Unit, Faculty of Social Sciences, University of Helsinki, Helsinki, Finland
3. Social, Genetic, and Developmental Psychiatry Centre, Institute of Psychiatry, Psychology, and Neuroscience, King’s College London, London, United Kingdom
4. Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
5. Orebro University School of Medical Sciences, Orebro, Sweden