1. Iris van 't Erve, MSc, Department of Pathology, the Netherlands Cancer Institute, Amsterdam, the Netherlands; Cornelis J.A. Punt, MD, PhD, Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, the Netherlands; and Gerrit A. Meijer, MD, PhD, and Remond J.A. Fijneman, PhD, Department of Pathology, the Netherlands Cancer Institute, Amsterdam, the Netherlands