1. Rheumatology Unit, Division of Rheumatology, Allergy and Immunology, Massachusetts General Hospital, Yawkey 2, 55 Fruit Street, Boston, MA 02114, USA
2. Department of Pathology, Queen Elizabeth Hospital, Wylie Road, Kowloon, Hong Kong
3. Department of Pathology, Massachusetts General Hospital, Warren 2, 55 Fruit Street, Boston, MA 02114, USA
4. Department of Gastroenterology and Hepatology, Kansai Medical University, Japan
5. Division of Hematology and Immunology, Department of Internal Medicine, Kanazawa Medical University, 1-1 Daigaku, Uchinada-machi, Kahoku-gun, Ishikawa 920-0293, Japan
6. Histopathology Section, Institute of Liver Studies, King’s College Hospital, Denmark Hill, London SE5 9RS, UK