1. Pediatrics Surgery Department Papageorgiou General Hospital Thessaloniki, Thessaloniki, Greece
2. Neurosurgical Department G. Papanikolaou General Hospital Thessaloniki, Thessaloniki, Greece
3. Biopathology-Clinical Biochemistry Aristotle University of Thessaloniki, Thessaloniki, Greece
4. Department of Medical Physics, Interbalkan Hospital, Thessaloniki, Greece
5. Department of radiation oncology, Papageorgiou General Hospital, Thessaloniki, Greece
6. Orthopaedic Department, Limassol General Hospital, Kato Polemidia, Cyprus
7. Department of Pediatric Surgery Aristotle University of Thessaloniki, Thessaloniki, Greece
8. Radiology Department Evelight Radiology, United Kingdom
9. Pediatrics Department Papageorgiou General Hospital Thessaloniki, Thessaloniki, Greece
10. 1st Pediatrics Surgery Department Genimatas General Hospital Thessaloniki, Thessaloniki, Greece
11. Department of Surgery, ``AHEPA`` University Hospital, Aristotle University of Thessaloniki, Medical School, Thessaloniki, Greece
12. Department of Surgery, University Hospital of Alexandroupolis, Medical School, Democritus University of Thrace, Alexandroupolis, Greece