1Martin GR. Isolation of a pluripotent cell line8 from early mouse embryos cultured in medium conditioned by teratocarcinoma stem cell [ J ]. Proc Natl Acad Sci USA,1981,78(2) :7634.
2Eglitis MA, Mezey E . Hematopoietic cells diffrerentiate into both microgila and macroglia in the brains of adult mice [ J ]. Proc Natl Acad Sci USA, 1997,94(8) :4080 -4085.
3Muraglia A, Cancedda R, Quarto R. Clonal mesenchymal progenitors from human bone marrow differentiate in vitro according to a hierarchical model[ J ]. J Cell Sci, 2000, 113 (Pt 7) : 1161 -1166.
