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Title Die Prävalenz von Antikörpern gegen delta-Antigen in HBsAg-positiven Sera aus verschiedenen Kollektiven Title Prevention and control of hepatitis B in the community Title Viral hepatitis and hepatocellular carcinoma : proceedings of the 2nd international symposium on viral hepatitis and hepatocellular carcinoma, December 7-9, 1988, Taipei Title Viral hepatitis : biological and clinical features, specific diagnosis, and prophylaxis