Department of Health Services Research & Policy, London School of Hygiene and Tropical Medicine, 15-17 Tavistock Place, London, WC1H 9SH, UK. andrew.briggs@lshtm.ac.uk. Oncology Unit, Ospedale del Mare, Napoli, Italy. Avalon Health Economics LLC, Morristown, NJ, USA. University of Glasgow, Glasgow, UK. Medical Department, University Medical Center Mainz, Mainz, Germany. The Christie NHS Foundation Trust, Manchester, UK. Hospital Universitario Marqués de Valdecilla, IDIVAL, Santander, Cantabria, Spain. Department of Public Health, Health Services Research and Health Technology Assessment, UMIT - University for Health Sciences, Medical Informatics, and Technology, Hall i.T., Hall in Tirol, Austria. Department of Health Policy and Management, Harvard Chan School of Public Health and Dept of Radiology, Harvard Medical School, Boston, MA, USA. Division of HTA, ONCOTYROL-Center for Personalized Cancer Medicine, Innsbruck, Austria. Department of Health Economics and HTA, Purple Squirrel Economics, New York, NY, USA.