1 Rik J. Verheijden, MSc, Department of Medical Oncology, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands, Department of Epidemiology, Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands; Jolien S. de Groot, MD, PhD, Babs O. Fabriek, PhD, and Miki N. Hew, MD, PhD, Medicines Evaluation Board, Utrecht, the Netherlands; Anne M. May, PhD, Department of Epidemiology, Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands; and Karijn P.M. Suijkerbuijk, MD, PhD, Department of Medical Oncology, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands.