1. From the Cancer Research UK Epidemiology Unit, University of Oxford, Oxford, United Kingdom (FLC, TJK, PNA, and RCT); the Department of Clinical Epidemiology, Aalborg Hospital, Aarhus University Hospital, Aalborg, Denmark (KO and MUJ); the Institute of Cancer Epidemiology, Danish Cancer Society, Copenhagen, Denmark (NFJ and AT); the German Cancer Research Center, Division of Cancer Epidemiology,