1. Department of Human Biology/NUTRIM (J.M.O., W.H.M.S., M.A.v.B.), Maastricht University, 6200 MD Maastricht, The Netherlands;
2. Department of Chronic Diseases Epidemiology (C.T.M.v.R.), 3720 BA Bilthoven, The Netherlands
3. Laboratory of Health Effects Research (B.H.), National Institute of Public Health and the Environment, 3720 BA Bilthoven, The Netherlands