An epidemiological evidence of association between ABO blood groups and ruptured oesophago-gastric varices.
D000017:ABO Blood-Group System; D004534:Egypt; D004932:Esophageal and Gastric Varices / Q000150:complications / Q000453:epidemiology*; D006396:Hematemesis / Q000209:etiology; D006801:Humans; D012422:Rupture, Spontaneous; D012552:Schistosomiasis / Q000150:complications
D000017:ABO Blood-Group System