About the Authors

Maria Gudrun Biersack

maria.biersack@charite.de

Affiliation Department of Rheumatology and Clinical Immunology, Charité–Universitätsmedizin Berlin, Germany

Malgorzata Hajdukiewicz

Affiliation Department of Rheumatology and Clinical Immunology, Charité–Universitätsmedizin Berlin, Germany

Ralf Uebelhack

Affiliation Department of Psychiatry and Psychotherapy, Charité–Universitätsmedizin Berlin, Germany

Leonora Franke

Affiliation Department of Psychiatry and Psychotherapy, Charité–Universitätsmedizin Berlin, Germany

Helmut Piazena

Affiliation Medical Photobiology Group, Department of Internal Medicine, Charité–Universitätsmedizin Berlin, Germany

Pascal Klaus

Affiliation Department of Rheumatology and Clinical Immunology, Charité–Universitätsmedizin Berlin, Germany

Vera Höhne-Zimmer

Affiliation Department of Rheumatology and Clinical Immunology, Charité–Universitätsmedizin Berlin, Germany

Tanja Braun

Affiliation Department of Rheumatology and Clinical Immunology, Charité–Universitätsmedizin Berlin, Germany

Frank Buttgereit

Affiliation Department of Rheumatology and Clinical Immunology, Charité–Universitätsmedizin Berlin, Germany

Gerd-Rüdiger Burmester

Affiliation Department of Rheumatology and Clinical Immunology, Charité–Universitätsmedizin Berlin, Germany

Jacqueline Detert

Affiliation Department of Rheumatology and Clinical Immunology, Charité–Universitätsmedizin Berlin, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: MGB MH RU VHZ TB JD HP. Performed the experiments: MGB MH VHZ TB JD. Analyzed the data: MGB MH LF PK JD. Contributed reagents/materials/analysis tools: RU VHZ TB FB GRB JD HP. Wrote the paper: MGB LF PK VHZ TB FB GRB JD HP.