1. Department of Public Health and Preventative Medicine, Oregon Health and Science University, Portland, OR, USA. winthrop@ohsu.edu
2. The First Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health Japan, Kitakyushu, Japan.
3. Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea.
4. Rheumatologie Hamburg, Struenseehaus, Hamburg, Germany.
5. Rheumatology Department, Al Jahra Hospital, Al Jahra, Abu Halifa, Kuwait.
6. Department of Medicine, Universidade Federal do Paraná, Curitiba, Brazil.
7. Department of Medicine, The University of Alabama at Birmingham, Birmingham, AL, USA.