1 Department of Orthopaedic Surgery, Boston University Medical Center, Boston, Massachusetts.
2 Department of Orthopaedic Surgery, Martini Hospital, Groningen, The Netherlands.
3 Department of Orthopaedic Surgery and Traumatology, Elhadarah University Hospital, Alexandria University, Alexandria, Egypt.
4 Department of Orthopaedic Surgery, University Medical Center Groningen, Groningen, The Netherlands.
5 Nisantasi Orthopaedics Center, Istanbul, Turkey.
6 Department of Orthopaedic Surgery, Algiers, Algeria.
7 Department of Orthopaedic Surgery, Isala Hospital, Zwolle, The Netherlands.
8 Department of Orthopaedic Surgery, Lebanese American University Medical Center-Rizk Hospital, Lebanese American University School of Medicine, Beirut, Lebanon.