1. Plastic and Reconstructive Surgery Unit, Department of Surgery, Faculty of Medicine Suez Canal University Ismailia Egypt
2. Department of Orthopaedic Surgery and Traumatology, Faculty of Medicine Cairo University Giza Egypt
3. Department of Maxillofacial Surgery, Faculty of Dentistry Cairo University Giza Egypt
4. Department of Hand Surgery, Plastic Surgery and Burns, and Department of Biomedical and Clinical Sciences Linköping University Linköping Sweden
5. Podiatric Surgery Unit, Department of Surgery University of Cincinnati Cincinnati Ohio USA
6. Department of Orthopaedic Surgery and Traumatology, Faculty of Medicine Ain Shams University Cairo Egypt
7. Department of Orthopaedic Surgery and Traumatology, Faculty of Medicine Minia University Minya Egypt