14th St. Gallen international breast cancer conference 2015: evidence, controversies, consensus : primary therapy of early breast cancer : opinions expressed by German experts - Jackisch, Christian; Harbeck, Nadia; Huober, Jens; Minckwitz, Gunter von; Gerber, Bernd; Kreipe, Hans H.; Kolberg-Liedtke, Cornelia; Marschner, Norbert; Möbus, Volker; Scheithauer, Heike; Schneeweiss, Andreas (Breast care, 2015)