Hormonal receptors, cell proliferation fraction (Ki-67) and c-erbB-2 amplification in breast cancer. Relationship between differentiation degree and axillary lymph node metastases

1. Sirvent, J.J.
2. Santafe, M.
3. Salvado, M.T.
4. Alvaro, T.
5. Raventos, A.
6. Palacios, J.