1 P. Studenic, MD, PhD, Karolinska Institutet, Department of Medicine (Solna), Division of Rheumatology, Stockholm, Sweden, and Medical University of Vienna, Department of Medicine 3, Division of Rheumatology, Vienna, Austria; [email protected].
2 H. Radner, Associate Professor, MD, Medical University of Vienna, Department of Medicine 3, Division of Rheumatology, Vienna, Austria.