1 Department of Psychiatry and Behavioral Neuroscience, University of Cincinnati College of Medicine, Cincinnati, Ohio.
2 Department of Medicine, Oregon Health and Science University, Portland, Oregon.
3 Division of Rheumatology and Immunology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee.
4 Epidemiology Group and Aberdeen Centre for Arthritis and Musculoskeletal Health, School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, United Kingdom.
5 Departments of Anesthesiology, Medicine (Rheumatology), and Psychiatry, University of Michigan Medical School, Ann Arbor, Michigan.
6 Department of Medicine, Oregon Health and Science University, Portland, Oregon; Department of Medicine, Tufts University School of Medicine, Boston, Massachusetts; Department of Nursing, Oregon Health and Science University, Portland, Oregon.
7 Division of Rheumatology, Department of Medicine, McGill University, Montreal, Quebec.
8 Division of Rheumatology, Department of Medicine, Federal University of Parana, Curitiba, Brazil.
9 Division of Rheumatology, Department of Medicine, University of Florida, Gainesville, Florida.
10 Division of Rheumatology, Department of Medicine, Milan University, Milan, Italy.
11 Department of Medicine, H. Soroka Medical Center, Ben Gurion University of the Negev, Beer Sheva, Israel.