1. Paez-Ribes M, Allen E, Hudock J et al (2009) Antiangiogenic therapy elicits malignant progression of tumors to increased local invasion and distant metastasis. Cancer Cell 15:220–231
2. Ebos JM, Lee CR, Cruz-Munoz W, Bjarnason GA, Christensen JG, Kerbel RS (2009) Accelerated metastasis after short-term treatment with a potent inhibitor of tumor angiogenesis. Cancer Cell 15:232–239
3. Steeg PS, Anderson RL, Bar-Eli M, Chambers AF, Eccles SA, Hunter K et al (2009) Preclinical drug development must consider the impact on metastasis. Clin Cancer Res 15:4529–4530
4. Miller FR, Medina D, Heppner GH (1981) Preferential growth of mammary tumours in intact mammary fatpads. Cancer Res 41: 3863–3867
5. Wang WR, Sordat B, Piguet D, Sordat M (1982) Human colon tumors in nude mice: implantation site and expression of the invasive phenotype. In: Sordat B (ed) Immune-deficient animals. Karger, Lausanne, Switzerland, pp 239–245