Didier Verhoeven is Head of the Department of Medical Oncology at AZ Klina, and Chair of the Breast Clinic Voorkempen, in Brasschaat, Belgium, and Guest Professor at the University of Antwerp, Antwerp, Belgium. Cary S. Kaufman is Medical Director at Bellingham Regional Breast Center, Bellingham, and Associate Professor of Surgery at the University of Washington, Seattle, USA. Previously he was President of the National Accreditation Program for Breast Centers (NAPBC), and President of the National Consortium of Breast Centers (NCBC). Robert Mansel is Chair of the Quality Assurance Committee of the ECIBC, and Professor Emeritus of Surgery at the University of Cardiff School of Medicine, Cardiff, UK. He was formerly President of the European Society of Breast Cancer Specialists (EUSOMA). Sabine Siesling is Professor of Outcomes Research and Personalized Cancer Care at the University of Twente, Enschede, and Senior Researcher at the Netherlands Comprehensive Cancer Organisation (IKNL), Utrecht, the Netherlands. She was formerly President of the Netherlands Epidemiology Society, and General Secretary of the International Association of Cancer Registries (IACR).