1Centre du sein, Département de Gynécologie et d’Obstétrique, Hôpitaux Universitaires de Genève, Bd de la Cluse 30, 1211 Geneva 14, Switzerland
2Brust-Zentrum Zürich, Seefeldstr. 214, 8008 Zurich, Switzerland
3Clinic for Gynecology, University Hospital Zurich, 8091 Zurich, Switzerland
4Swiss Group for Clinical Cancer Research, Bern, Switzerland
5Institute of Pathology and Molecular Pathology, University Hospital Zurich, Schmelzbergstrasse 12, 8091 Zurich, Switzerland
6Ringlikerstrasse 53, 8142 Uitikon Waldegg, Switzerland