9Lasfargues E Y. Cultivation and behavior in vitro of the normal mammary epithelium of the adult mouse: II. observations on the secretory activity[J]. Exp Cell Res, 1957,13: 553- 562.
10Mather J, Sato G H. The use of hormone-supplemented se rum-free media in primary cultures [J]. Cell Res, 1979, 124;215 -221.
