4Gleeson M,Sharron T H,Warren A M.et al.Salivary lgA subclasses and infection risk in elite swimmers [J].lmmunol Cell Biol,1999,77(4):315 - 355.
5Viot M,Thyss A et al. Cancer . 1983
6Liebman HA et al.Des-r-Carboxy(abnormel)Profhro mbin as a Serum marker of primary hepatocellular earcinoma. The New England Journal of Medicine . 1984