*Massimo Cristofanilli,Circulating Tumor Cells, Disease Progression, and Survival in Metastatic Breast Cancer, NEJM Vol 351 august 2004, http://content.nejm.org/cgi/content/abstract/351/8/78 | *Massimo Cristofanilli,Circulating Tumor Cells, Disease Progression, and Survival in Metastatic Breast Cancer, NEJM Vol 351 august 2004, http://content.nejm.org/cgi/content/abstract/351/8/78 |