A new method for identifying blood of the portal ciiirculation.
D004932:Esophageal and Gastric Varices / Q000209:etiology*; D006471:Gastrointestinal Hemorrhage / Q000209:etiology*; D006470:Hemorrhage; D006801:Humans; D011169:Portal Vein / Q000502:physiology*
ESOPHAGEAL VARICES/etiology; HEMORRHAGE, GASTROINTESTINAL/etiology; PORTAL VEINS/physiology