1. From the National Institute for Public Health and the Environment (RIVM), Bilthoven, Netherlands (HD, DLvdA, and HCB); the Department of Human Biology, Nutrition, and Toxicology, the Research Institute of Maastricht, Maastricht, Netherlands (HD and WHMS); the Medical Research Council Epidemiology Unit, Institute of Medical Science, Cambridge, United Kingdom (NGF and NJW); the Danish Cancer Societ