1. From the Nutritional Epidemiology, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden (C.D.-V., A.A.)
2. Department of Public Health and Clinical Medicine, Occupational and Environmental Medicine (A.T., J.S., I.A.B.)
3. and Nutritional Research (M.W.)
4. Umeå University, Sweden; and Department for Health Security, Environmental Health Unit, National Institute for Health and Welfare, Kuopio, Finland (H.K., P.R.).