1. Department of Paediatrics Venizeleion General Hospital of Heraklion Heraklion Greece
2. National Meningitis Reference Laboratory National School of Public Health Athens Greece
3. Department of Paediatrics Chania General Hospital Chania Greece
4. Department of Paediatrics Sitia General Hospital Sitia Greece
5. Department of Microbiology Heraklion University Hospital Heraklion Greece
6. Department of Paediatrics University of Crete Crete Greece