1. Department of Nuclear Medicine, Brussels University Hospital (H.U.B), 1070 Brussel, Belgium
2. Department of Rheumatology, C.H.U Brugmann, 1020 Brussel, Belgium
3. Department of Internal Medicine, C.H.U Brugmann, 1020 Brussel, Belgium
4. Department of Intensive Care Unit, C.H.U Brugmann, 1020 Brussel, Belgium