4Wu S, Yang P, Li H, et al. Influenza vaccination cover- age rates among adults before and after the 2009 influ- enza pandemic and the reasons for non - vaccination in Beijing, China: A cross - sectional study [ J ]. BMC Public Heahh,2013,13(8) :636.
5Arocho A, Chen B, Ladanyi M, et al. Validation of the 2 -DehaDeltaCt calculation as an alternate method of data analysis for quantitative PCR of BCR - ABL P210 transcripts [ J ]. Diagnostic Molecular Pathology, 2006, 15(1) :56 -61.
