1European Organisation for Research and Treatment of Cancer (EORTC) Headquarters &Breast Cancer Group, Avenue Mounier 83/11, 1200 Brussels, Belgium.
2Department of Oncology and Radiotherapy, Medical University of Gdansk, Ul Debinki 7, 80211 Gdansk, Poland.
3Breast Unit, Champalimaud Clinical Centre, Avenida De Brasília s/n, 1400-038 Lisbon, Portugal
