1. Laboratory of Gene Regulation and Signal Transduction, Department of Pharmacology and Cancer Center, University of California, San Diego, CA 93093, USA.
2. Department of Medicine, Division of Gastroenterology, University of California, San Diego, CA 93093, USA.
3. Division of Gastroenterology, The Institute for Adult Diseases, Asahi Life Foundation, 1-6-1 Marunouchi, Chiyoda-ku, Tokyo 100-0005, Japan.
4. Liver Research Group, University of Newcastle, Newcastle Upon Tyne NE2 4HH, UK.