5Nubling CM,Daas A,Buchheit KH.Collaborative study for establishment of a European Pharmacopoei Biological Reference Preparation (BRP) for B19 virus DNA testing of plasma pools by nucleic acid amplification technique.Pharmeuropa Bio,2004,2003:27-34.
6Holmes H,Davis C,Heath A,et al.An international collaborative study to establish the 1st international standard for HIV-1 RNA for use in nucleic acid-based techniques.J Virol Methods,2001,92:141-150.
7Saldanha J,Heath A,Aberham C,et al.World Health Organization collaborative study to establish a replacement WHO international standard for hepatitis C virus RNA nucleic acid amplification technology assays.Vox Sang,2005,88:202-204.
8Davis C,Heath A,Best S,et al.Calibration of HIV-1 working reagents for nucleic acid amplification techniques against the 1 st international standard for HIV-1 RNA.J Virol Methods,2003,107:37-44.
9Al-Soud WA,Jonsson LJ,Radstrom P.Identification and characterization of immunoglobulin G in blood as a major inhibitor of diagnostic PCR.J Clin Microbiol,2000,38:345-350.
10Abu Al-Soud W,Radstrom P.Purification and characterization of PCR inhibitory components in blood cells.J Clin Microbiol,2001,39:485-493.
3Zhang ZH, Li L, Zhao XP, et al. Elimination of hepatitis B virus suriace antigen and appearance of neutralizing antibodies in chronically infected patients without viral clearance[J] .J Viral Hepat,2011,18(6):424- 433.
4Zhang Z, Li L, Tian Y, et ah HBsAg/ HBsAb double positive hepatitis B virus infection model in vitro and in vivo[J]. J HuazJlong Univ Sci Teehnolog Med Sci,2009,29(5) :575 -579.
6Lee HW,Kim H J, Hong SP,et al. Simultaneous emergence of en- tecavir resistance mutations in a nucleoside-naive chronic hepatitis B patientEJ. Intervirology, 2012,55 (5) : 380-384.
7Witjes CD, Ijzermans JN, van der Eijk AA, et al. Quantitative HBV DNA and AST are strong predictors for survical after HCC detection in chronic HBV patientsEJ. Neth J Med,2011,69(11) : 508 513.
8Mota A, Guedes F, Areias J, et al. Epiclemiological and genetypie profile of hepatitis B virus infection in Northern PortugalrJ. Rev Sande Publian,2010,44(6) :1087 1093.