1. Division of Gastroenterology/Hepatology, Scripps Clinic, La Jolla and
2. National Genetics Institute Los Angeles, California,
3. University of Florida Miami, Florida,
4. Department of Pathology St Luke's Hospital, Pasadena, California, USA.
5. Huntington Memorial Hospital, Pasadena and
6. Participants of the consensus interferon study group are listed in Appendix I