1. Orthopaedic Research Unit, Division of Orthopaedic Surgery, Department of Surgery, Faculty of Health Science, University of Cape Town, Cape Town 7925, South Africa
2. Department of Traumatology, University Hospital Zurich, University of Zurich, 8091 Zurich, Switzerland
3. General Medicine & Global Health Research Unit, Department of Medicine and Cape Heart Institute, Faculty of Health Science, University of Cape Town, Cape Town 7925, South Africa
4. CUBIC, PET/CT, Department of Medicine, University of Cape Town, Cape Town 7925, South Africa
5. Department of Internal Medicine, University Hospital Zurich, University of Zurich, 8091 Zurich, Switzerland