[Clinical study of sporadic acute non-A, non-B hepatitis. 4-year survey in Tokyo].
D000328:Adult; D000368:Aged; D005260:Female; D006526:Hepatitis C / Q000453:epidemiology*; D006525:Hepatitis, Viral, Human / Q000453:epidemiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D014041:Tokyo