Winette T A van der Graaf1, Robin L Jones2. 1. Division of Clinical Studies, Institute of Cancer Research and Sarcoma Unit of the Royal Marsden NHS Foundation Trust, London SW3 6JJ, UK; Department of Medical Oncology, Radboud University Medical Center, Nijmegen, Netherlands. 2. Division of Clinical Studies, Institute of Cancer Research and Sarcoma Unit of the Royal Marsden NHS Foundation Trust, London SW3 6JJ, UK. Electronic address: robin.jones4@nhs.net.