1. Department of Orthopedics & Traumatology, “Tzaneio” General Hospital of Piraeus, 185 36 Piraeus, Greece
2. Scolio Centar, 403916 Novi Sad, Serbia
3. Department of Pediatric Rehabilitation, Institute for Physical and Rehabilitation Medicine “Dr Miroslav Zotovic“, 78000 Banja Luka, Bosnia and Herzegovina
4. 3rd Department of Orthopaedics, School of Medicine, KAT Hospital, National and Kapodistrian University of Athens, 165 41 Athens, Greece