1. Department of Preventive Medicine and Health Promotion Research Center, School of Medicine, Kyungpook National University, Daegu, Korea
2. Division of Epidemiology, School of Public Health, University of Minnesota, Minneapolis, Minnesota, USA
3. Department of Nutrition, University of Oslo, Oslo, Norway
4. Institut Municipal d’Investigació Mèdica, and School of Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain