1. Al Hajj M, Wicha MS, Benito-Hernandez A, Morrison SJ and Clarke MF . (2003). Proc. Natl. Acad. Sci. USA, 100, 3983–3988.
2. Ball RK, Friis RR, Schoenenberger CA, Doppler W and Groner B . (1988). EMBO J., 7, 2089–2095.
3. Baselga J and Norton L . (2002). Cancer Cell, 1, 319–322.
4. Bieche I, Laurendeau I, Tozlu S, Olivi M, Vidaud D, Lidereau R and Vidaud M . (1999). Cancer Res., 59, 2759–2765.
5. Brown AM, Wildin RS, Prendergast TJ and Varmus HE . (1986). Cell, 46, 1001–1009.