1 Department of Orthopedic Surgery, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands. Electronic address: w.fussenich@umcg.nl.
2 Department of Orthopedic Surgery, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands; University Hospital for Orthopaedics and Trauma Surgery Pius-Hospital, Medical Campus University of Oldenburg, Oldenburg, Germany.
3 Department of Orthopedic Surgery, Rijnstate Hospital, Arnhem, the Netherlands.
4 Department of Orthopedic Surgery, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands.