Blood plasma/serum will be banked at the UC Davis GI Biobank for future liver-related study use in -80°C freezer. Samples will be used for liver related studies. Potential future analyses of plasma samples could include fatty liver metabolomics analyses. All future Sample specimens will be stored for as long as they are viable (for up to 20 years). Dr. Sarkar and his study staff will maintain records of the storage location and have access to them.