AUTHOR CONTRIBUTIONS
RT designed and performed the experiments, collected experimental data
and wrote the paper draft; YCP helped designed the study, performed
experiments and the paper writing; LYD assisted Dot blot assay and
animal experiments; YHL, LLY took part and assisted in some experiments;
YMF, TGD made constructive suggestions on the experimental design and
data analysis; XL provided the laboratory where experiments being
conducted,financial supports,
designed the study, and finished
final writing of the paper.