1. Department of Public Health, Section of Epidemiology, University of Copenhagen, Copenhagen, 2200, Denmark
2. Centre of Excellence for Nutrition, North-West University, Potchefstroom, 2520, South Africa
3. Medical Research Council Unit for Hypertension & Cardiovascular Disease, North-West University, Potchefstroom, 2520, South Africa
4. MRC Integrative Epidemiology Unit, University of Bristol, Bristol, BS8 6BN, UK
5. Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, BS8 6BN, UK
6. School of Biosciences & Medicine, Faculty of Health & Medical Sciences, University of Surrey, Guildford, Surrey, GU2 7XH, UK