1. Department of Pediatrics, Division of Rheumatology, Washington University School of Medicine, St. Louis, MO
2. Department of Medicine, Division of Rheumatology, Washington University School of Medicine, St. Louis, MO
3. Department of Pathology and Immunology, Division of Anatomic and Molecular Pathology, Washington University School of Medicine, St. Louis, MO
4. Department of Medicine, Division of Gastroenterology, Washington University School of Medicine, St. Louis, MO