3Nishizawa T,Okamoto H,Konishi K,et al. A novel DNA virus (TTV) associated with elevated transminase levels in posttransfusion hepatitis of unknown etiology. Biochem Biophys Res Commun,1997,241(1): 92- 97.
4Takahashi K,Hoshino H,Ohta Y,et al. Analysis of the entire genomes of the thirteen TT virus classifiable into fourth and fifth genetic groups isolated from viremic infants. Arch Virol,2002,147(1): 21- 41.
5Okamoto H,Nishizawa T,Kato N,et al. Molecular cloning and characterization of a novel NDA virus ( TTV) associate with posttransfusion hepatitis of unknown etiology. Hepatol Ris,1998,10(1): 1- 16.
6Tanaka H,Okamoto H,Luengrojanakul P, et al. Infection with an unevelope DNA virus (TTV) associated with posttransfusion non-A to G haptitis patients and hearth blood donors in Thailand. J Med Virol,1998,56(3): 234- 238.
7Nidl C,Oliveira JM,Ross RS,et al. High prevalence of TT virus infection in Brazilian blood donors. J Med Virol,1999,57(3): 259- 263.
8Charlton M,Adjei P,Poterucha J,et al. TT-virus infection in North American blood donors,patients with fulminant hepatic failure and cryptogenic cirrhosis. Hepatology,1998,28(10): 839- 842.
9Okamoto H,Akahane Y,Ukita M,et al. Fecal excretion of a nonenveloped DNA virus ( TTV) associated with posttransfusion non -A-G hepatitis. J Med Virol,1998,56(6): 128- 132.