[1] West German Study Grp, Monchengladbach, Germany
[2] Breast Ctr Niederrhein Johanniter Clin, Monchengladbach, Germany
[3] Univ Clin Cologne, Monchengladbach, Germany
[4] Charite Univ Med Berlin, Campus Mitte, Berlin, Germany
[5] City Hosp Dortmund, Westphalian Breast Ctr, Dortmund, Germany
[6] Med Sch Hannover, Inst Pathol, Hannover, Germany
[7] Breast Ctr, Clin Essen Mitte, Essen, Germany
[8] Womens Clin, Univ Clin Tuebingen, Tubingen, Germany
[9] Breast Ctr Ostbayern, DONAUISAR Clin Deggendorf, Deggendorf, Germany
[10] Rotkreuzklinikum Munich, Breast Ctr, Munich, Germany
[11] Evangel Waldkrankenhaus, Dept Oncol, Berlin, Germany
[12] Univ Munich LMU, Breast Ctr, Munich, Germany
[13] CCCLMU, Munich, Germany
[14] Med Sch Hannover, Inst Pathol, Monchengladbach, Germany