1. Institute of Social Paediatrics and Adolescent Medicine, Ludwig-Maximilians-University, Munich.
2. Institute and Outpatient Clinic for Occupational, Social and Environmental Medicine, Hospital of the Clinical Center of the Unit for Occupational and Environmental Epidemiology & Net Teaching, Ludwig-Maximilians-University, Munich.
3. Department of Neurology, Klinikum Grosshadern, Ludwig-Maximilians-University, Munich.