1. Department of Preventive Medicine (D.-H.L.), School of Medicine, Kyungpook National University, Daegu 700-422, Korea;
2. BK21 Plus KNU Biomedical Convergence Program, Department of Biomedical Science (D.-H.L.), Kyungpook National University, Korea;
3. Hospital del Mar Institute of Medical Research (M.P.), School of Medicine, Universitat Autonoma de Barcelona, and Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública, Barcelona 08193, Spain;
4. Division of Epidemiology (D.R.J.), School of Public Health, University of Minnesota, Minneapolis, Minnesota 55455;
5. Department of Nutrition (D.R.J.), University of Oslo, 0313 Oslo, Norway;
6. University of Massachusetts–Amherst (L.N.V.), School of Public Health, Division of Environmental Health Sciences, Amherst, Massachusetts 01003