1 III Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, and Department of Rheumatology and Immunology, Klinikum Bad Bramstedt, Germany. [email protected].
2 III Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
4 III Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, and Department of Rheumatology and Immunology, Klinikum Bad Bramstedt, Germany.