Evaluating associations of joint swelling, joint stiffness and joint pain with physical activity in first-degree relatives of patients with rheumatoid arthritis: Studies of the Aetiology of Rheumatoid Arthritis (SERA), a prospective cohort study

• Michael H Weisman,
• Joachim H Ix,
• Jill M Norris,
• James R ODell,
• Ted R Mikuls,
• Kevin D Deane,
• V Michael Holers,
• M Kristen Demoruelle,
• Jane H Buckner,
• Richard M Keating,
• Jan M Hughes-Austin,
• Samuel R Ward

Affiliations

Michael H Weisman

School of Medicine, Division of Rheumatology, Cedars-Sinai Medical Center, Los Angeles, California, USA

Joachim H Ix

Department of Medicine, Division of Nephrology-Hypertension, University of California, San Diego, La Jolla, California, USA

Jill M Norris

Department of Epidemiology, Colorado School of Public Health, University of Colorado - Anschutz Medical Campus, Aurora, Colorado, USA

James R ODell

College of Medicine, Division of Rheumatology, University of Nebraska Medical Center, Omaha, Nebraska, USA

Ted R Mikuls

College of Medicine, Division of Rheumatology, University of Nebraska Medical Center, Omaha, Nebraska, USA

Kevin D Deane

School of Medicine, Department of Rheumatology, University of Colorado - Anschutz Medical Campus, Aurora, Colorado, USA

V Michael Holers

School of Medicine, Department of Rheumatology, University of Colorado - Anschutz Medical Campus, Aurora, Colorado, USA

M Kristen Demoruelle

School of Medicine, Department of Rheumatology, University of Colorado - Anschutz Medical Campus, Aurora, Colorado, USA

Jane H Buckner

Translational Research Institute, Benaroya Research Institute at Virginia Mason, Seattle, Washington, USA

Richard M Keating

Division of Rheumatology, Scripps Green Hospital, La Jolla, California, USA

Jan M Hughes-Austin

Department of Orthopaedic Surgery, University of California, San Diego, La Jolla, California, USA

Samuel R Ward

Department of Orthopaedic Surgery, University of California, San Diego, La Jolla, California, USA