1. Division of Epidemiology; Institute of Social Paediatrics and Adolescent Medicine; Ludwig-Maximilians-University Munich; Munich Germany
2. Department of Paediatric Neurology and Developmental Medicine; Hauner Children's Hospital; Ludwig-Maximilians-University Munich; Munich Germany
3. Department of Neurology; Ludwig-Maximilians-University Munich; Munich Germany
4. Department of Medical Informatics, Biometry and Epidemiology; Ludwig-Maximilians-University Munich; Munich Germany