Center for Interstitial and Rare Lung Diseases, Department of Pneumology, Thoraxklinik, University of Heidelberg, Heidelberg, Germany; German Center for Lung Research, Heidelberg, Germany.

Center for Interstitial and Rare Lung Diseases, Ruhrlandklinik, Pneumonology Department, University of Duisburg-Essen, Essen, Germany.

Division of Rheumatology, Department of Internal Medicine V, University Hospital Heidelberg, Heidelberg, Germany.

Clinic for Rheumatology and Clinical Immunology, University Hospital Schleswig-Holstein, University of Lübeck, Lübeck, Germany.

Department of Rheumatology, Kerckhoff Clinic, Bad Nauheim, Germany.

Centre for Interdisciplinary Rheumatology, Immunology and Auto-inflammatory Diseases and Department of Internal Medicine 2, University Hospital Tübingen, Tübingen, Germany.

Department of Rheumatology and Clinical Immunology, Charité – Universitaetsmedizin Berlin, Berlin, Germany.

Berlin Institute of Health, Berlin, Germany.

Department of Dermatology, University Hospital Carl Gustav Carus, TU Dresden, Dresden, Germany.

Division of Rheumatology and Systemic Inflammatory Diseases, University Hospital Hamburg; Rheumatology Clinic, Bad Bramstedt, Germany.

Division of Rheumatology and Systemic Inflammatory Diseases, University Hospital Hamburg; Rheumatology Clinic, Bad Bramstedt, Germany.

Rheumatology/Clinical Immunology, Department of Internal Medicine II, University Hospital Würzburg, Würzburg, Germany.

Department of Rheumatology, Osteology and Pain Therapy, Center for Rheumatology Brandenburg, Johanniter-Hospital Treuenbrietzen, Treuenbrietzen, Germany.

Department of Nephrology and Rheumatology, University Medical Center Göttingen, Göttingen, Germany.

Department of Dermatology, Venereology and Allergology, St. Josef Hospital Bochum, Bochum, Germany.

Department of Rheumatology, Immanuel Hospital Berlin-Buch, Berlin, Germany.

Department of Dermatology, Venereology and Allergology, Charité – Universitaetsmedizin Berlin, Berlin, Germany.

Rheumatology and Clinical Immunology, University Medical Center Freiburg, Freiburg, Germany.

Department of Dermatology, University Hospital Münster, Münster, Germany.

Department of Dermatology, University Hospital Halle (Saale), Halle, Germany.

Department of Internal Medicine, Division of Rheumatology, University Hospital Halle (Saale), Halle, Germany.

Department of Internal Medicine 3, Rheumatology & Immunology, Friedrich-Alexander-University (FAU) Erlangen-Nürnberg and University Hospital Erlangen, Erlangen, Germany.

Department for Rheumatology, Immunology and Osteology, St. Josef Hospital Wuppertal, Wuppertal, Germany.

Department of Dermatology, Venereology and Allergology, Helios St Elisabeth Hospital Oberhausen, University Witten/Herdecke, Oberhausen, Germany.

Institute of Medical Statistics and Computational Biology (IMSB), University Hospital Cologne, Cologne, Germany.

Division of Rheumatology, Department of Internal Medicine V, University Hospital Heidelberg, Heidelberg, Germany.

Department of Dermatology and Venereology, University Hospital Cologne, Cologne, Germany.

Department of Dermatology and Venereology, University Hospital Cologne, Cologne, Germany.