Liver Diseases Branch, Division of Intramural Research, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland.
Address correspondence and reprint requests to Dr Theo Heller, Bldg 10, Room 9B16, 10 Center Drive, National Institutes of Health, Bethesda, MD 20892-1800 (e-mail: Heller:TheoH@intra.niddk.nih.gov).
Received 28 September, 2012
Accepted 3 October, 2012
The authors report no conflicts of interest.