[1] Kantonsspital, Div Med Oncol, Luzern, Switzerland
[2] Univ Bern, Dept Med Oncol, CH-3012 Bern, Switzerland
[3] Royal Free Hampstead NHS Trust, Univ Dept Surg, London, England
[4] Univ Coll Med Sch, London, England
[5] Klin Hirslanden, Inst Radiat Therapy, Zurich, Switzerland
[6] European Sch Oncol, Milan, Italy
[7] Champalimaud Canc Ctr, Breast Canc Unit, Lisbon, Portugal