single-cell suspensions obtained from 22 freshly excised breast neoplasms ( 20 malignant , 2 benign ) were plated in soft agar with and without tamoxifen ( tam ) ( 10 ( -7 ) m ) with the use of serum-supplemented media and with and without 17 beta-estradiol ( e2 ) ( 10 ( -8 ) m ] under serum-free medium conditions .
C1458155
breast
C0014912
17 beta-estradiol