1. Department of Orthopedic Surgery, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands
2. Department of Orthopedic Surgery, Amsterdam University Medical Centers, 1105 AZ Amsterdam, The Netherlands
3. Division of Orthopaedic Surgery, Mount Sinai Hospital, Toronto, ON M5G 1X5, Canada
4. Department of Orthopaedic Surgery, Mayo Clinic, Rochester, MN 55905, USA
5. Department of Orthopaedic Surgery, Medical College of Wisconsin, Milwaukee, WI 53226, USA
6. Department of Orthopedic Surgery, Royal Prince Alfred Hospital, Sydney, NSW 2050, Australia
7. Department of Orthopaedic Surgery, University of California-Davis, Sacramento, CA 95817, USA
8. Rothman Institute and Department of Orthopedic Surgery Thomas Jefferson University, Philadelphia, PA 19107, USA
9. Department of Orthopaedic Surgery, University of California-Los Angeles, Los Angeles, CA 90404, USA
10. Department of Orthopaedics, Radboudumc, 6525 GA Nijmegen, The Netherlands
11. Department of Medical Oncology, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands