1. Department of Child and Adolescent Psychiatry, Democritus University of Thrace, Medical School, Alexandroupolis, Greece
2. Department of Child and Adolescent Psychiatry, Democritus University of Thrace, Medical School, University Hospital of Alexandroupolis, Alexandroupolis, Greece
3. Department of Medical Statistics, Democritus University of Thrace, Medical School, Alexandroupolis, Greece
4. Autism Clinic, Department of Child and Adolescent Psychiatry, University of Zurich, Zurich, Switzerland
5. Department of Psychiatry, Democritus University of Thrace, Medical School, University Hospital of Alexandroupolis, Alexandroupolis, Greece