1 Department of Orthopedics and Traumatology, St.-Antonius-Hospital, Kleve, Albersallee 5-7, 47533 Kleve, Germany. Electronic address: [email protected].
2 Department of Orthopedics, Xpert Orthopedics and Specialized Centre of Orthopedic Research and Education (SCORE), Laarderhoogtweg 12, 1101 EA Amsterdam, the Netherlands.
3 Department of Orthopedics, Amsterdam University Medical Center, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands.