Primary breast cancer therapy in six regions of Germany. - Engel,J.; Nagel,G.; Breuer,E.; Meisner,C.; Alber,U.S.; Stelocke,K.; Sauer,H.; Katenkamp,D.; Mittermayer,C.; Heidemann,E.; Schulz,K.D.; Kunath,H.; et al. (Eur J Cancer, 2001)