7Atrat P,Horholdc,Buchar MJ,et al.Degradation of the side chain of cholesterol derivatives with immobilized mycobacterium phlei and smegmatis cell[J].Z Ally Mikrobiol,1980,20 (4):239-243.
8Corrigan CJ.A B Kay CD4+ lymphocyte activation in acute severe asthma:relationship to disease severity and atopic status[J].Am Rev Respir Dis,1990,Toc(4):970-977.