A patient presents to the emergency room with malaise. The physician notices slight jaundice. Serum chemistries reveal marked elevation of both aspaate aminotransferase (AST) and alanine aminotransferase (ALT), with the AST/ALT ratio being 2.5. Alkaline phosphatase is near normal. Serum copper and serum iron are normal. Liver damage from which of the following diseases most likely accounts for these findings?