About the Authors

Andreas P. Diamantopoulos

andreas.diamantopoulos@sshf.no

Affiliations Department of Rheumatology, Hospital of Southern Norway, Kristiansand, Norway, Department of Neurosciences, INM, Norwegian University of Science and Technology, Trondheim, Norway

Gudrun Rohde

Affiliations Department of Rheumatology, Hospital of Southern Norway, Kristiansand, Norway, Faculty of Health and Sport, University of Agder, Kristiansand, Norway

Irene Johnsrud

Affiliation Department of Rheumatology, Hospital of Southern Norway, Kristiansand, Norway

Inger M. Skoie

Affiliation Department of Rheumatology, Hospital of Southern Norway, Kristiansand, Norway

Marc Hochberg

Affiliation Departments of Medicine, Epidemiology and Preventive Medicine, University of Maryland School of Medicine, Baltimore, Maryland, United States of America

Glenn Haugeberg

Affiliations Department of Rheumatology, Hospital of Southern Norway, Kristiansand, Norway, Department of Neurosciences, INM, Norwegian University of Science and Technology, Trondheim, Norway

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: GH. Performed the experiments: GR IJ IMS. Analyzed the data: APD GH. Contributed reagents/materials/analysis tools: APD GH MH GR IJ IMS. Wrote the paper: APD GH MH.