[1] Georgetown Univ, Lombardi Comprehens Canc Ctr, Dept Oncol, 3800 Reservoir Rd NW, Washington, DC 20007 USA
[2] Clin Breast Care Project, Windber, PA 15963 USA
[3] Univ Regensburg, Div Oncogen, Dept Pathol, D-93053 Regensburg, Germany
[4] Univ Milan, Sch Med, Dept Pathol, I-20141 Milan, Italy
[5] European Inst Oncol, I-20141 Milan, Italy