1 Department of Oncology and Metabolism, University of Sheffield, Sheffield, UK.
2 Frankfurt Centre of Bone Health, Frankfurt, Germany; Philipps University of Marburg, Marburg, Germany.
3 CHU Brugmann, Université Libre de Bruxelles, Brussels, Belgium.
4 Medical Oncology Department, University Campus Bio-Medico, Rome, Italy.
5 Department of Radiation Oncology, University of Toronto, Toronto, Canada.
6 National and Kapodistrian University of Athens, School of Medicine, Athens, Greece.
7 Department of Medical Oncology, Georges Pompidou Hospital, Paris Descartes University, Paris, France.
8 Institute of Clinical Medicine, University of Oslo, Oslo, Norway; Department of Oncology, Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway.
9 Department of Nuclear Medicine, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium.
10 Department of Orthopaedic and Trauma Surgery, Campus Kemperhof, Community Clinics Middle Rhine, Koblenz, Germany; Major Teaching Hospital of the University Medicine Mainz, Mainz, Germany.
11 University of Michigan, Ann Arbor, USA.
12 Genolier Cancer Centre, Genolier, Switzerland.
13 Department of Medicine V, Hematology, Oncology and Rheumatology, University of Heidelberg, Heidelberg, Germany.