1. Yale University School of Medicine, New Haven, Connecticut, and Veterans Affairs Connecticut Healthcare System, West Haven VAMC West Haven Connecticut
2. Hospital General de México Dr. Eduardo Liceaga Mexico City Mexico
3. Centro Regional de Enfermedades Autoinmunes y Reumáticas Rosario Argentina
4. Red Cross War Memorial Children's Hospital and University of Cape Town Cape Town South Africa
5. Peking Union Medical College Hospital Beijing China
6. University of Alabama at Birmingham, and Universidad Peruana Cayetano Heredia Lima Perú
7. Yale University School of Medicine New Haven Connecticut
8. National Institute of Arthritis and Musculoskeletal and Skin Diseases, NIH Bethesda Maryland