Presence of systemic illness or other medical conditions relevant to survival .(Note that in the HCC pre liver transplant cohort, the presence of HCC will not be considered an exclusion criteria) Metastatic cancer Evidence of decompensated liver disease (uncontrolled ascites, or uncontrolled spontaneous encephalopathy) Prior surgical weight loss procedures including gastroplasty, jejunoileal, or jejunocolic bypass, total parenteral nutrition within the past 6 months; Prior history of gastric pancreatic, hepatic, and/or splenic surgery Prior embolization to the stomach, spleen or liver. If review of available prior imaging studies (i.e CT, MRI, or US)shows potential anatomical variations, presence of severe atheromatous disease, large arteriovenous shunting of blood.