1. Department of Medicine; Yale University School of Medicine; New Haven CT
2. Department of Biostatistics; Yale School of Public Health; New Haven CT
3. Institute of Biochemistry and Molecular Cell Biology; RWTH Aachen University; Aachen Germany
4. Department of Plastic Surgery; RWTH Aachen University; Aachen Germany
5. Department of Anatomy and Cell Biology; Justus-Liebig-University; Giessen Germany
6. Sapporo Immuno Diagnostic Laboratory; Sapporo Japan
7. Department of Nephrology and Monash University Department of Medicine; Monash Medical Center; Clayton Victoria Australia
8. Division of Gastroenterology; Tufts Medical Center; Boston MA