[1] Univ Hosp Erlangen, Comprehens Canc Ctr Erlangen EMN, Erlangen, Germany
[2] Univ Southern Calif, Norris Comprehens Canc Ctr, Los Angeles, CA USA
[3] Breast Ctr Klinikum Fuerth, Furth, Germany
[4] Univ Hosp Erlangen, Inst Pathol, Erlangen, Germany