About the Authors

Sofia Löfvendahl

Hsofia.lofvendahl@med.lu.se

Affiliations Department of Orthopedics, Clinical Sciences Lund, Lund University, Lund, Sweden, Epidemiology and Register Centre South, Skåne University Hospital, Lund, Sweden

Elke Theander

Affiliation Department of Rheumatology, Skåne University Hospital Malmö, Lund University, Malmö, Sweden

Åke Svensson

Affiliation Department of Dermatology, Skåne University Hospital Malmö, Lund University, Malmö, Sweden

Katarina Steen Carlsson

Affiliation Department of Clinical Sciences, Malmö, Lund University, Skåne University Hospital Malmö, Sweden

Martin Englund

Affiliations Department of Orthopedics, Clinical Sciences Lund, Lund University, Lund, Sweden, Epidemiology and Register Centre South, Skåne University Hospital, Lund, Sweden, Clinical Epidemiology Research & Training Unit, Boston University School of Medicine, Boston, Massachusetts, United States of America

Ingemar F. Petersson

Affiliations Department of Orthopedics, Clinical Sciences Lund, Lund University, Lund, Sweden, Epidemiology and Register Centre South, Skåne University Hospital, Lund, Sweden, Arthritis Research UK Primary Care Centre, Keele University, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SL ET ÅS ME IFP. Performed the experiments: SL ET ÅS IFP. Analyzed the data: SL ET ÅS KSC ME IFP. Contributed reagents/materials/analysis tools: SL ET ÅS IFP. Wrote the paper: SL ET ÅS KSC ME IFP.